Craftsman 636.796912 Owner's Manual
owner's manual MODEL NO. 636.796912 CAUTtON: Read Rules for Safe Operation and Instructions Carefully I:RRF [$MRtl 37°7 cc (:;AS POWER BLOWER o Assembly ⢠Maintenance oOperation ⢠Repair Parts 6619501201 6619501201 iV88 Sears, Roebuck and Co., Chicago, IlL 60684 U.S.A. PR|NTED IN JAPAN
TWO YEAR LIMITED WAF_RANTY ON CRAFTSMAN POWER BLOWER 636,796912 For two years from data of purchase, when this POWER BLOWER is maintained° lubricated, and tuned up according to the operating and maintenance instructions in the owner's manua], Sears will repair free of charge any defect in material or' workmanship. This warranty exctudas _alower pipes, spark plug, and air cteaner; which are expandable parts and become worn during normal use. If this POWER 8LOWER is used for commercial or rental purposes, this warranty applies for only 30days from the date of purchase. WARRANTY SERVICE tS AVAILABLE BY CONTACTING THE NEAREST SEARS SERVICE CENTER/DEPART- MENT IN THE UNITED STATES, This warranty applies only while this product is in usa in the United St0tes, This warranty gives you spectflc legal rights, and you may also have other rights which very from state _o state, SEARS, ROEBUCK AND CO. DEPT, 698/731A SEARS TOWER , CHICAGO, 1LLINOIS 60684 INTRODUCTION The Sears Power Blower, Model 636.796912 is a lightweight, high performance 2 cycle two stroke, gasoiine powered blower, which is designed for autumn leaves, driveway and sidewalk sweeping, gutter cleaning, light snow and debris removal. The blower works faster' and more efficiently than rakes or brooms. Excellent balance, a vibration damping system and light weight ensure comfortable, safe and fatigue-free operation. This manual provides instructions for assembly, operation and maintenance for your' unit. Be sure to read this manual before operation. IMPORTANT RULES FOR SAFE OPERATION 1. Gasoline (t) Handle gasoline with care. it is high inflammable° (2) Use proper' gasoline-oil fuel mixture° See P, 4. (3) Refuel before starting work. (4) Do not refuel a hot engine. (5) Avoid spilling fuel or oil. Always wipe unit dry before using° (6) Move at least 3 meters (10 feet) away from the fueling point before starting engine. (7) Always store gasoline in approved container'. 2. Operation (1) Do not operate in unventilated area, (2) Do not allow bystanders in work area. (3) Always wear light clothing.
3_ (4) Always wear safety glasses and a face filter mask. Wear ear protectors where possible. (5) Do not touch muffler, spark phJg and rotating parts, (6) Do not run the machine without flexible corrugated pipe and spent pipe or the engine may be damaged, (7) Do not use the machine in such a way that the end of spout pipe may be covered, Check (1) Always check periodically for efficient and safe operation. (2) Before Storing, drain fuel tank and carburetor. (3) Wash air cleaner element with neutral detergent and dry it well. (4) Remove dust from blower, (5) Tighten bolts further if they are ioose, (6) Replace damaged parts, (7) Always use proper parts for replacement° SECT!ON I. SECTION I1, SECTION Ill, SECTION IV, SECTION V, SECTION Vl, SECTION VII_ SECTION VIII, SECTION IX, SECTION X, SECTtON XI. TABLE OF CONTENTS Page TECHNICAL SPECIFICATIONS ................................. 4 COMPONENT IDENTIFICATION .................................. 4 ASSEMBLY INSTRUCTIONS ...................................... 5 PREPARATION FOR USE ....................................... 5 STARTING THE ENGINE ...................................... 5 STOPPING THE ENGINE ........................................ 6 i OPERATING THE POWER BLOWER ............................. 6 CHECK AND MAINTENANCE .................................. 6 STORAGE AFTER USE ........................................ 7 TROUBLESHOOTING .......................................... 8 SPARE PARTS LIST ........................................... 10
t, TECHNICAL SPECIFICATIONS Model 636.796912 Dimensions Weight, dry Fuel capacity Engine Type D isplacement Ignition system : Carburetor Spark plug Spark plug gap Starker Max, air volume : Max. air speed Muffler Fuel LxWxH=450x490x495mm(17.7in. x19.3in, x19,5in.) 8 kg (17.6 Ibs,) 2,4 litre (0.634 gel) Air cooled two stroke 37,7 cc (23 cuing) Solid State Ignition Float type S.T,D, 360942 0,,6 - 0,7 mm (,024 - ,028") Automatic recoil 11 rn 3/min, (385 cu,fto/min,.) 83 m/sec, (273 ft/sec.) Spark arrester Fuel-Oil Mix Between 20 and 25 to 1 For the first twenty hours, use the mixing ratio of between 15 and 20 to 1 *Specifications are subject to change without notice, I1o COMPONENT IDENTIFICATION Fuel Tank Cap, Recoil Air Cleaner Thro_le Lever Spout Pipe-- _Straigh% Pipe Straight Pipe Jr-L_ U _ Swivel Joint )ark Plug _Wing Hose Band Pipe Figure 1 / Bent Tube
III. ASSEMBLY INSTRUCTIONS I, Attach throttle lever to the machine_ {Fig_ 2) Note: Ensure that the lever can be operated normally 'L Figure 2 2. Attach shoulder straps to the machine {Fig_ 3) Note: Adjust the straps to fit your body. Figure 3 3o Assemble blower pipes, (Fig 1) Note; Assemble pipes securely or they may separate , while operating. IV. PREPARATION FOR USE 1, Ensure again that all parts are assembled normally and that aft nuts and bolts are properly tightened 2, Adjust shoulder straps to fit your body so that pads rest comfortably on your shoulder or you will be tired 3. Fuel and oil mixing (1) Mixing ratio of fuel and oil: 20- 25 : 1 Example: 20 : t = gasoline 1 gal : oil 7 oz. 25 : 1 = gasoline 1 gal, : oil 6 oz, (2) Pour half the gasoline into the container, add oil and shake to ensure thorough mixing, Now add the remainder of gasoline and shake again WARNING: Experience indicates that alcohol blended fuels {called gasohot or using ethanol or methanol) can attract moisture which leads to separation and formation of acids during storage. Acidic gas can damage the fuel system of an engine while in storage To avoid engine problems, the fuel system should be emptied before storage for 30 days or longer Drain the gas tank, start the engine and let it run until the fuel lines and carburetor are empty. Use fresh fuel next season. See Storage Instructions for additional information. Never use engine or carburetor cleaner products in the fuel tank or permanent damage may occur CAUTION: When preparing fuel mixture, mix onty the amount needed for the job you are to do Do not use fuel mixture that has been stored longer than two (2) months. Fuel mixture stored longer than this will cause hard starting and poor performance if fuel mix has been stored longer than this time it should be removed and filled with a fresh mixture. Use only a good grade of recJular gasoline, Use only a reputable brand of 2{ycte, air cooled engine oil, Sears Chain Saw Oil is especially suited to this engine, For the first twenty hours, use the mixing ratio of be- tween 15 and 20 to 1, 4_ Fill the tank with fuel without spilling° (t) Do not fill fuel above fuel limit level, (Fig. 4) (2) Wipe all spilled fuel with a dry cloth, (3) Always attach the fuel strainer. (Fig° 11) (4) Tighten fuel cap securely, Figure 4 Vo STARTING THE ENGINE(Fig 5&6) 1. Open fuel cock, (Fig 5) 2_ Ctose choke lever. [Fig. 5) Note: In winter, c!ose fully, but in summer or when the engine is warm, open partly or fully.
Figure 5 UP (High speed) t Throttle lever ! DOWN (Low speed) Stow Figure 7 3. 4_ Push up throttle lever, (Fig° 7) Holding the machine by your left hand and putting your left foot on the machine frame, give a strong and straight puii to recoil starter by your' right hand. (Fig 6) CAUTION Do not putl off rope, but return it gently with care_ Figure 6 5. After the engine fires, open choke lever gradually to re. duce engine speed 6. Warm up the engine at low _peed Note: winter: about 5 min.. summer: 2 - 3 rain,. VI. STOPPING THE ENGINE 1, Push down throttle lever to reduce engine speed,. 2. Stop the engine by pushing stop button. (Fig. 7) 3, Put the machine down on the ground and close fuel cock, VII, OPERATING THE POWER BLOWER 2. Adjust shoulder straps correctly to make the machine fit your body. After the engine fires, put the machine on your back without inciiningo 3, The velocity of air stream can be controlled from a gentle breeze to a high-speed blast by throttle lever, 4_ Select the best speed for each application of the blower, Example: low speed for blowing dry leaves from lawn and high speed for moving gravel or dirt from driveway, (Fig. 8 & 9) CAUTION o Do not point the blower pipe in the direction of people or animals, e Always wear safety gtasses and use-a dust mask. = Do not operate in unventilated area. Figure 9 Figure 8
V!II, CHECK AND MAINTENANCE Air cleaner (Fig, 10) (1) Remove air cleaner cover and take out air filter. (2) Accumulated dust on the air filter will reduce engine efficiency and increase fuel consumption.. (3} Wash air filter and dry it wett_ CAUTION Do not use gasoline and inflammable solvent to clean the filter, Air cleaner Air cleaner cover filter , Figure 10 Fuel strainer (Fig, 11) (t) Fuel tank is fitted with a fuel strainer located under filler cap Do not remove this strainer when filling the tank., (2) The strainer should be removed and cleaned at regular intervals, .-------Fuet tank cap ..-------- Fuel strainer "_._.. =,-_----- Packing B 4, Figure 12 Carburetor {Fig. !3) (t) Carburetor has been correctly adjusted at the factory for optimum performance,, (2) To adjust idling speed, turn the throttle stop screw (turning it clockwise increases engine speed and turning it counterclockwise reduces the speed]. (3} Idling speed must be adjusted to the minimum constant speed. I Throttle stop screw Figure 13 5_ MUFFLER AND EXHAUST PORT (Fig. 14) In the event _hat the engine should lose power and overheat, the muffler should be removed and checked for excessive deposits, Carbon build up in the exhaust port should be removed with a piece of wood, removing that particles of carbon deposits from the muffler flange area and wash the complete unit in a suitable solvenL 3, Figure 11 Spark plug (Fig° 12) (1} Clean or replace the plug if fouled with oily black deposits, (2) Replace the plug if the center electrode is rounded at the end or if the ground electrode is worn,, (3) Adjust the gap 0,6 - 0 7 mm (.024 - ,028"). Muffler Screw Figure 14 ...... . ......... " Spark arrester
IX. STORAGE AFTER USE 1. Correctly preparing your Sears Power Blower for extend- ed s_orage wil_ be amply rewarded by an increased service life and trouble.free performance_ 2 Drain fuel tank and carburetor thoroughly, Drain carburetor through drain cock, 3. Remove spark plug, pour one teaspoon of engine oil into cylinder and pull recoil starter gently to distribute the oil. Replace spark plug securely, 4_ Thoroughly clean the unit and coat unprotected surfaces with oil to prevent rust, 5, Store the unit in a dry atmosphere and keep out dust, It is important to prevent gum deposits from forming in essential fuel system parts such as the carburetor, fuel filter, fuel hose_ or tank during storage. Also, experience indicates that alcohol b_ended fuels (called gasohol or using ethanot or methanol} can attract moisture which leads to separation and formatior_ of acids during storage_ Acidic gas can damage the fuel system of an engine while in storage To avoid _engine problems, the fuel system shoutd be emptied before storage of 30 days or longer. Follow these instructions: X_ TROUBLE SHOOTING Refer to the chart to locate the problem and take the appropriate action_ Table 1 o == E o 5 = c _ w "o w Fuel is not .............................. reaching carburetor Fuel line hose clogged ............... Clean_ ) ,E _= ,_ = r- L_ ° r* U u U_ Fuel is not reaching m/tinder _ Ignition coil ._t M "_ c _in good c_ o condition 0 r z_ = Piston& cylinder worn ............ Replace, _ Strainer c_ogged Clean. Carburetor out of order ......... Oi_ssembte and check, _W_re connection defective ....... Reconnect High_tenslon cord connection defective ................ Repair as neces_ary_ ._= r_ _0 Insulator cracked ........................ Replace plug. ___ Spark gap incorrect .................. Adiust, ⢠No spark at plug Covered with carbon ................. Clean or replace. Fouled with fuel ............................... C_ean or repia_e -_ Fue] does not keep _-- running E _ "_ Accelera, _ tion and 2 _ _ low speed p function L_ _ _ defect,re u_u L Carburetor over fl_,_ Starting procedures incorrect ............................. Start correctly Fuel valve c)ogged with dust ................................ Clean. L-_ Fuel p_sega in carburetor n --s ..... clogged with dust .................. _d _=.ru_= and reD&ace, Fuei leak;no from fixing ___ surfaces of carburetor ........ Retighten. Carburetor does not work normally ................ Replace. L-_ Crankcase and cylinder Stop leakage_ pressure leaks .......... .......... Fuel inlet needle vatve c)ogged with dust ............... Clean,. This is because fuel mtxlure Exhaust pipe sticky is; too rich_ with fuel ..................... Start the engine several times with choke lever fully open_ Bearing damaged ........................... Ofsassemble and replace ( _} Piston and cylinder seized ...... Olsassemb(e and replace. Crankshaft worn ..................... Disassemb{e and replace, m Crankshaft contacting t_; ...... _,_. crankcase ........................................... and replace,
Table 2 _J Engine overheated lrn ro er fuel used Use fuet with correct mixing ratio, '- P P ' " .............. Never use ga=oline of poor quality, I Spark plug defective Re_t._ _ ------- (burnt) ................................ _., .... As cooling fi_s clog, air ^. f, --" does not pass well ................... _lean ms, / Excessive deposits in 0t m-" n- L L-.--_ combustion chamber .......... ' ...... sasse ote a o remove caroono Firing funcdon defective ! Plug damaged or fouled ........... Replace or clean,, F---- ; L.--- Combustion poor due to Check wiring, : defective wiling ................... Carburetor defective Other troubtes Needle setting ..... , ............. Readiust,, =_C_ inc°trect Carburetor overflow ................. Refer to Table 1, Air cleaner clogged ................. Clean a_ necessary,, Compression insufficient Disassemble, check and replac_ {piston ring stuck or ............... if necessary, worn out) Cylinder chrome plating Replace cylinder, _-- peeled or worn out ................. Exhaust port clogged with carbon ........................ Clean as nec_ssary_ Throttle is not fully Readiust,
o SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure t5 39 29 44 52 24 38 22 36 3O 2! 23
KEY NO, 2 3 4 5 6 7 8 9 10 11 12 13 14 t5 16 17 t8 19 2O 2t 22 23 24 25 26 27 28 29 3O 31 32 33 34 35 36 37 38 39 PART NO. NF04S-0150A NF04S-1101 *RB N F04S-! 102-RB N F04S-1104F N F04S-1107A F L40-11098-PB NF04S. 1114 N F04S-1115 FH04S-t 104 FL40-1110 0420 22998 0 F L40-201 IA-RB FL40-2012A NF40-2101A EC02_083 EC02_644 FL40-3101A FL40-3102 FL40-5011 FL40-S012 EC02-720 00113 0618 0 00165 0612 0 00218 05O0 0 00218 0600 0 00218 1000 0 00227 0400 0 00310 0500 0 00311 0600 o 00311 1oo0 o 00312 0500 0 00312 0600 0 00320 O4O0 0 00320 0500 0 00320 0600 o 00320 1000 0 00431 05t4 0 00431 05t2 0 00435 0516 0 SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure 15 QTY. OESCRIPT!ON t Muffler mounting plate ass'¥ 1 Volute case (frontl ! Voluse case (rear) I Ben I tube 2 Screw (MS x 67) 1 Engine cover 1 impeller spacer 1 Cover t Plug 1 |repeller 1 Plug (rubber} 1 Frame compl. 1 Shoulder pad compl. 2 Vibration-proof rubber t Fuel lank cop ass°y (|ncl. t6} 1 Packing A 1 Fuel tank I Fuel-line hose 1 Throttle lever 1 Throttle wire 1 -SLop l_u _on 4 8o1_ (M6x 18) 3 Bolt (M6 x 12) g Nut (MS) 5 Nut (M.6) 1 NuL_!MIo 1 Nut (M4) 4 Washer (M5) B Washer (M6) Washer (M10) 4 Washer (M5} 4 Washer (M6} 1 Spring washer (M4} 2 Spring washer (MS) 10 Spnng washer (M6) t Spring washer (M 10) 4 Screw (pan head) (MS x 14) t :Screw (pan head) (M5 x 12) 7 Screw a_'v (M5 x 18} KEY PART NO. NO. QTY. 40 00431 06t 0 0 2 41 00431 0616 0 4 42 00628 3085 0 I 43 EC03-6103 1 44 _ FL40-3103 1 45 F L40-9106 1 46 0561 13998 2 2 47 064! 27999 0 t 48 EC05A-6111 # 49 RS0211-202B-RB 2 50 N B30K*6103 2 51 P503-5111 t 52 00436 05t2 0 I j_ DESCRIPTION Screw (pan head) (M6 x 10) Screw (pan head) (M8 x 16} 0 ring Fuel-llne hose prozecl|on tube P1_te Label Clamp (Hose} Fuel sIratner Packing Pla_e Vibration-proof rubber Plug (rubber) Screw ass'y
SEARS POWER BLOWER PARTS LIST-MODEL 636,796912 Figure 16 37 20 ⢠21 \ \ 24 23 48 4O 44 \ 32 27 28 26 31 36 3O 29 2 \ 38-39 17 _:_1516 19 5 I 1 3
KEY NO. ! 2 3 4 5 6 7 B 9 10 11 12 13 14 15 16 t7 18 19 20 2t 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 PART NO. QTY. EC04_072 1 0440 12999 i t 0440 15997 1 1 0600 15988 0 2 EC03-071 1 0119 05994 0 4 0105 06994 0 6 ECO4JDt 25 1 EC03-I09A ! EC04-091A 1 EC04-t{ 04c ! E C03-115 2 0119 05995 0 4 EC04-0222 1 EC04-206/28 I EC04-207A 1 EC04-2 t 0A 2 O565 11999 0 2 0610 12996 1 1 EC04-0516A 1 EC04-0513A 1 A50103212700 I 243051821009 4 451050600009 4 A54103200100 1 A55003210001 1 A60003200000 1 A60102600000 1 A5600260029t ! 141051251002 I A60503210000 ! A57120950000 1 A57202700000 1 EC04-0378 1 EC04-3122 I 00433 0520 0 3 F L40-910512A ! EC04-0718A 1 11100100100 1 SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure t6 DESCRIPTION Crank case ass'v (Incl. 2 Ihru 7) Oil seal (front} Oil seal (rear) Ball bearing Crank case packing Bob (socket head) (M5 x 30| Stud {M6) Cylinder cornpt. (Incl. 7) Cylinder packing Reed ass'y Carburetor bracket Reed bracket packing Boll (socket head} (MS x 18) Crank shall ass'y Piston Piston pin Piston ring Clip Needle bearing Recoil starter compI. {Incl. 21 thru24! RecoiI starter ass'y (incl. 25 thtu 33 | Starter case B Screw (MS x 18) Washer (M5} Reel Ratchet Spiral spring Frtction spring Frici|on plate Bind screw (M5 x 12) Return spring Statler rope Starter knob Muffler compl. Mu f fief gasket S_rew ass'y (M5 x 20} Label (model) Magneto comp{. (incl. 39. 401 Flywheel KEY PART NO, NO. QTY. 40 11400331000 1 41 KM61_B8e 1 42 0650 14995 0 1 43 0t70 08996 0 I 44 0203 08999 0 1 45 - 00218 0600 0 6 46 00310 0800 0 1 47 00320 0600 0 6 48 00434 0420 0 2 49 00532 0310 0 t 50 0566 05998 0 1 51 00310 0500 0 I 52 00431 0510 0 1 53 00532 0320 0 t 54 ECO4_379ATA 1 55 0043104100 1 56 0022704000 I DESCR IPTION Ignition coil Plug cap Spark plug Nut {left} {M8) Spring washer (M8) Nut (M6) Washer (MS| Spring washer (M6) Screw ass'V (M4 x 20) Woodruff key Clamp Washer (M5) Screw (pan head) (M5 x t0) Woodruff key Spark attester Screw (pan head) {M4 x 10) Nut (M4) o_
SEARS POWER BLOWER PARTS LIST- MODEL 636.796912 Figure t 7 / 35 33 1 18 27 26 29
KEY NO. ! 2 3 4 5 6 7 8 9 1t 12 13 14 15 16 t7 _8 t9 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 PART NO. EC04-O682A CKI31 832-16001 J8-3 N05 MDt4140 VM14ci,/38b VMI5124A VMI6/200 VM12143 MD13/44 M21/t5 VM241148 Nt02-22t VMt 5/I 73 VM15/353 VM151264 VM15/351 VM131139 852-00031 EC03-S0Ol 0 VM13i68A VM131326 B2--0830 B34183 VM131215 VM15/331 VM18i164A CW2_0416 VMI51348 VM13/210 CW2"0414 EC04-O335B 0736 36998 0 00436 0410 0 EC04-3304A EC04-3305 SEARS POWER BLOWER PARTS LIST- MODEL 636.796912 Figure 17 QTY. I t 1 ! ! 1 1 1 1 1 1 1 ! 1 1 1 1 I 1 1 1 I I 1 1 1 1 2 1 1 2 1 1 4 1 2 DESCRIPTION Carburetor compl. (Incl. 2 thru 31} Cock body ass'y Piston _r_lve (#1"0) Jet needle E ring Spring seat Spring Top Cap Cable guide Cable _djuster lock nut Cable adjuster Main jet (#77.5) Needle ass*y Float arm Float pin Gasket Float Float chamber body Guido screw assay O ring Clip Bolt Washer Nut Spring Throttle stop screw Spring washer cross screw Gasket Filter Spring we=her cross screw Air cleaner oss'y (Incl. 33, 35, 36) Labe_ Screw ass'y (M4 x tO) Air cleaner cap Element
SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure I8 °\ \ \ 7 \ I1
SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure 18 KEY NO. t 2 3 4 5 6 7 8 9 10 1t 12 13 14 15 PART NO, N F04S_09031t FL40-9001 N F31-097B N F04S-9121 F L40-9120 F L40-9121 NF40-7120 FL40-9012 FL40-9014 0717 04999 0 6619501201 0700 00994 0 0715 06999 0 07t3 21999 0 07t 0 08999 0 OTY. 1 1 I t 2 1 1 1 1 1 1 t t 1 I DESCRIPTION Wing hose band (big) Shou|dor band ass'y Wing hose band Corrugated pipe Straight pipe End pipe Hose clamp Swivel joint Tool kit (Inc1.10,12 thrul 5) Wrench (socket head} Owner's manual (FL40-9107!4) Tool bag PLus driver Box wrench(21 MiM ) Double,end wrench (8 x t0 M/M) ..& -M
OWNER'S MANUAL MODEL NO. 636.796912 HOW TO ORDER REPAIR PARTS I SEARS POWER BLOWER 1N 2_ 3, The model number of your power blower is located on the label on recoil starter of the engine. The serial number of your power blower is located on the label on the fan housing. When ordering repair parts, always give the following information: (1) Model number: 636.796912 (2) Name of item: 37.7 cc GAS POWER B LOWE R (3) Part number (4) Part description All parts listed may be ordered from any Sears Service Center or most Sears stores. (1) If the parts you need are not stocked Iocally, your order wilt be electronically transmitted to a Sears Repair' Parts Distri- bution Center for' handling, 6619501201 Sold by Sears, Roebuck and Co,, Chicago, IL60684 U.S.A. Printed in Japan
TWO YEAR LIMITED WAF_RANTY ON CRAFTSMAN POWER BLOWER 636,796912 For two years from data of purchase, when this POWER BLOWER is maintained° lubricated, and tuned up according to the operating and maintenance instructions in the owner's manua], Sears will repair free of charge any defect in material or' workmanship. This warranty exctudas _alower pipes, spark plug, and air cteaner; which are expandable parts and become worn during normal use. If this POWER 8LOWER is used for commercial or rental purposes, this warranty applies for only 30days from the date of purchase. WARRANTY SERVICE tS AVAILABLE BY CONTACTING THE NEAREST SEARS SERVICE CENTER/DEPART- MENT IN THE UNITED STATES, This warranty applies only while this product is in usa in the United St0tes, This warranty gives you spectflc legal rights, and you may also have other rights which very from state _o state, SEARS, ROEBUCK AND CO. DEPT, 698/731A SEARS TOWER , CHICAGO, 1LLINOIS 60684 INTRODUCTION The Sears Power Blower, Model 636.796912 is a lightweight, high performance 2 cycle two stroke, gasoiine powered blower, which is designed for autumn leaves, driveway and sidewalk sweeping, gutter cleaning, light snow and debris removal. The blower works faster' and more efficiently than rakes or brooms. Excellent balance, a vibration damping system and light weight ensure comfortable, safe and fatigue-free operation. This manual provides instructions for assembly, operation and maintenance for your' unit. Be sure to read this manual before operation. IMPORTANT RULES FOR SAFE OPERATION 1. Gasoline (t) Handle gasoline with care. it is high inflammable° (2) Use proper' gasoline-oil fuel mixture° See P, 4. (3) Refuel before starting work. (4) Do not refuel a hot engine. (5) Avoid spilling fuel or oil. Always wipe unit dry before using° (6) Move at least 3 meters (10 feet) away from the fueling point before starting engine. (7) Always store gasoline in approved container'. 2. Operation (1) Do not operate in unventilated area, (2) Do not allow bystanders in work area. (3) Always wear light clothing.
3_ (4) Always wear safety glasses and a face filter mask. Wear ear protectors where possible. (5) Do not touch muffler, spark phJg and rotating parts, (6) Do not run the machine without flexible corrugated pipe and spent pipe or the engine may be damaged, (7) Do not use the machine in such a way that the end of spout pipe may be covered, Check (1) Always check periodically for efficient and safe operation. (2) Before Storing, drain fuel tank and carburetor. (3) Wash air cleaner element with neutral detergent and dry it well. (4) Remove dust from blower, (5) Tighten bolts further if they are ioose, (6) Replace damaged parts, (7) Always use proper parts for replacement° SECT!ON I. SECTION I1, SECTION Ill, SECTION IV, SECTION V, SECTION Vl, SECTION VII_ SECTION VIII, SECTION IX, SECTION X, SECTtON XI. TABLE OF CONTENTS Page TECHNICAL SPECIFICATIONS ................................. 4 COMPONENT IDENTIFICATION .................................. 4 ASSEMBLY INSTRUCTIONS ...................................... 5 PREPARATION FOR USE ....................................... 5 STARTING THE ENGINE ...................................... 5 STOPPING THE ENGINE ........................................ 6 i OPERATING THE POWER BLOWER ............................. 6 CHECK AND MAINTENANCE .................................. 6 STORAGE AFTER USE ........................................ 7 TROUBLESHOOTING .......................................... 8 SPARE PARTS LIST ........................................... 10
t, TECHNICAL SPECIFICATIONS Model 636.796912 Dimensions Weight, dry Fuel capacity Engine Type D isplacement Ignition system : Carburetor Spark plug Spark plug gap Starker Max, air volume : Max. air speed Muffler Fuel LxWxH=450x490x495mm(17.7in. x19.3in, x19,5in.) 8 kg (17.6 Ibs,) 2,4 litre (0.634 gel) Air cooled two stroke 37,7 cc (23 cuing) Solid State Ignition Float type S.T,D, 360942 0,,6 - 0,7 mm (,024 - ,028") Automatic recoil 11 rn 3/min, (385 cu,fto/min,.) 83 m/sec, (273 ft/sec.) Spark arrester Fuel-Oil Mix Between 20 and 25 to 1 For the first twenty hours, use the mixing ratio of between 15 and 20 to 1 *Specifications are subject to change without notice, I1o COMPONENT IDENTIFICATION Fuel Tank Cap, Recoil Air Cleaner Thro_le Lever Spout Pipe-- _Straigh% Pipe Straight Pipe Jr-L_ U _ Swivel Joint )ark Plug _Wing Hose Band Pipe Figure 1 / Bent Tube
III. ASSEMBLY INSTRUCTIONS I, Attach throttle lever to the machine_ {Fig_ 2) Note: Ensure that the lever can be operated normally 'L Figure 2 2. Attach shoulder straps to the machine {Fig_ 3) Note: Adjust the straps to fit your body. Figure 3 3o Assemble blower pipes, (Fig 1) Note; Assemble pipes securely or they may separate , while operating. IV. PREPARATION FOR USE 1, Ensure again that all parts are assembled normally and that aft nuts and bolts are properly tightened 2, Adjust shoulder straps to fit your body so that pads rest comfortably on your shoulder or you will be tired 3. Fuel and oil mixing (1) Mixing ratio of fuel and oil: 20- 25 : 1 Example: 20 : t = gasoline 1 gal : oil 7 oz. 25 : 1 = gasoline 1 gal, : oil 6 oz, (2) Pour half the gasoline into the container, add oil and shake to ensure thorough mixing, Now add the remainder of gasoline and shake again WARNING: Experience indicates that alcohol blended fuels {called gasohot or using ethanol or methanol) can attract moisture which leads to separation and formation of acids during storage. Acidic gas can damage the fuel system of an engine while in storage To avoid engine problems, the fuel system should be emptied before storage for 30 days or longer Drain the gas tank, start the engine and let it run until the fuel lines and carburetor are empty. Use fresh fuel next season. See Storage Instructions for additional information. Never use engine or carburetor cleaner products in the fuel tank or permanent damage may occur CAUTION: When preparing fuel mixture, mix onty the amount needed for the job you are to do Do not use fuel mixture that has been stored longer than two (2) months. Fuel mixture stored longer than this will cause hard starting and poor performance if fuel mix has been stored longer than this time it should be removed and filled with a fresh mixture. Use only a good grade of recJular gasoline, Use only a reputable brand of 2{ycte, air cooled engine oil, Sears Chain Saw Oil is especially suited to this engine, For the first twenty hours, use the mixing ratio of be- tween 15 and 20 to 1, 4_ Fill the tank with fuel without spilling° (t) Do not fill fuel above fuel limit level, (Fig. 4) (2) Wipe all spilled fuel with a dry cloth, (3) Always attach the fuel strainer. (Fig° 11) (4) Tighten fuel cap securely, Figure 4 Vo STARTING THE ENGINE(Fig 5&6) 1. Open fuel cock, (Fig 5) 2_ Ctose choke lever. [Fig. 5) Note: In winter, c!ose fully, but in summer or when the engine is warm, open partly or fully.
Figure 5 UP (High speed) t Throttle lever ! DOWN (Low speed) Stow Figure 7 3. 4_ Push up throttle lever, (Fig° 7) Holding the machine by your left hand and putting your left foot on the machine frame, give a strong and straight puii to recoil starter by your' right hand. (Fig 6) CAUTION Do not putl off rope, but return it gently with care_ Figure 6 5. After the engine fires, open choke lever gradually to re. duce engine speed 6. Warm up the engine at low _peed Note: winter: about 5 min.. summer: 2 - 3 rain,. VI. STOPPING THE ENGINE 1, Push down throttle lever to reduce engine speed,. 2. Stop the engine by pushing stop button. (Fig. 7) 3, Put the machine down on the ground and close fuel cock, VII, OPERATING THE POWER BLOWER 2. Adjust shoulder straps correctly to make the machine fit your body. After the engine fires, put the machine on your back without inciiningo 3, The velocity of air stream can be controlled from a gentle breeze to a high-speed blast by throttle lever, 4_ Select the best speed for each application of the blower, Example: low speed for blowing dry leaves from lawn and high speed for moving gravel or dirt from driveway, (Fig. 8 & 9) CAUTION o Do not point the blower pipe in the direction of people or animals, e Always wear safety gtasses and use-a dust mask. = Do not operate in unventilated area. Figure 9 Figure 8
V!II, CHECK AND MAINTENANCE Air cleaner (Fig, 10) (1) Remove air cleaner cover and take out air filter. (2) Accumulated dust on the air filter will reduce engine efficiency and increase fuel consumption.. (3} Wash air filter and dry it wett_ CAUTION Do not use gasoline and inflammable solvent to clean the filter, Air cleaner Air cleaner cover filter , Figure 10 Fuel strainer (Fig, 11) (t) Fuel tank is fitted with a fuel strainer located under filler cap Do not remove this strainer when filling the tank., (2) The strainer should be removed and cleaned at regular intervals, .-------Fuet tank cap ..-------- Fuel strainer "_._.. =,-_----- Packing B 4, Figure 12 Carburetor {Fig. !3) (t) Carburetor has been correctly adjusted at the factory for optimum performance,, (2) To adjust idling speed, turn the throttle stop screw (turning it clockwise increases engine speed and turning it counterclockwise reduces the speed]. (3} Idling speed must be adjusted to the minimum constant speed. I Throttle stop screw Figure 13 5_ MUFFLER AND EXHAUST PORT (Fig. 14) In the event _hat the engine should lose power and overheat, the muffler should be removed and checked for excessive deposits, Carbon build up in the exhaust port should be removed with a piece of wood, removing that particles of carbon deposits from the muffler flange area and wash the complete unit in a suitable solvenL 3, Figure 11 Spark plug (Fig° 12) (1} Clean or replace the plug if fouled with oily black deposits, (2) Replace the plug if the center electrode is rounded at the end or if the ground electrode is worn,, (3) Adjust the gap 0,6 - 0 7 mm (.024 - ,028"). Muffler Screw Figure 14 ...... . ......... " Spark arrester
IX. STORAGE AFTER USE 1. Correctly preparing your Sears Power Blower for extend- ed s_orage wil_ be amply rewarded by an increased service life and trouble.free performance_ 2 Drain fuel tank and carburetor thoroughly, Drain carburetor through drain cock, 3. Remove spark plug, pour one teaspoon of engine oil into cylinder and pull recoil starter gently to distribute the oil. Replace spark plug securely, 4_ Thoroughly clean the unit and coat unprotected surfaces with oil to prevent rust, 5, Store the unit in a dry atmosphere and keep out dust, It is important to prevent gum deposits from forming in essential fuel system parts such as the carburetor, fuel filter, fuel hose_ or tank during storage. Also, experience indicates that alcohol b_ended fuels (called gasohol or using ethanot or methanol} can attract moisture which leads to separation and formatior_ of acids during storage_ Acidic gas can damage the fuel system of an engine while in storage To avoid _engine problems, the fuel system shoutd be emptied before storage of 30 days or longer. Follow these instructions: X_ TROUBLE SHOOTING Refer to the chart to locate the problem and take the appropriate action_ Table 1 o == E o 5 = c _ w "o w Fuel is not .............................. reaching carburetor Fuel line hose clogged ............... Clean_ ) ,E _= ,_ = r- L_ ° r* U u U_ Fuel is not reaching m/tinder _ Ignition coil ._t M "_ c _in good c_ o condition 0 r z_ = Piston& cylinder worn ............ Replace, _ Strainer c_ogged Clean. Carburetor out of order ......... Oi_ssembte and check, _W_re connection defective ....... Reconnect High_tenslon cord connection defective ................ Repair as neces_ary_ ._= r_ _0 Insulator cracked ........................ Replace plug. ___ Spark gap incorrect .................. Adiust, ⢠No spark at plug Covered with carbon ................. Clean or replace. Fouled with fuel ............................... C_ean or repia_e -_ Fue] does not keep _-- running E _ "_ Accelera, _ tion and 2 _ _ low speed p function L_ _ _ defect,re u_u L Carburetor over fl_,_ Starting procedures incorrect ............................. Start correctly Fuel valve c)ogged with dust ................................ Clean. L-_ Fuel p_sega in carburetor n --s ..... clogged with dust .................. _d _=.ru_= and reD&ace, Fuei leak;no from fixing ___ surfaces of carburetor ........ Retighten. Carburetor does not work normally ................ Replace. L-_ Crankcase and cylinder Stop leakage_ pressure leaks .......... .......... Fuel inlet needle vatve c)ogged with dust ............... Clean,. This is because fuel mtxlure Exhaust pipe sticky is; too rich_ with fuel ..................... Start the engine several times with choke lever fully open_ Bearing damaged ........................... Ofsassemble and replace ( _} Piston and cylinder seized ...... Olsassemb(e and replace. Crankshaft worn ..................... Disassemb{e and replace, m Crankshaft contacting t_; ...... _,_. crankcase ........................................... and replace,
Table 2 _J Engine overheated lrn ro er fuel used Use fuet with correct mixing ratio, '- P P ' " .............. Never use ga=oline of poor quality, I Spark plug defective Re_t._ _ ------- (burnt) ................................ _., .... As cooling fi_s clog, air ^. f, --" does not pass well ................... _lean ms, / Excessive deposits in 0t m-" n- L L-.--_ combustion chamber .......... ' ...... sasse ote a o remove caroono Firing funcdon defective ! Plug damaged or fouled ........... Replace or clean,, F---- ; L.--- Combustion poor due to Check wiring, : defective wiling ................... Carburetor defective Other troubtes Needle setting ..... , ............. Readiust,, =_C_ inc°trect Carburetor overflow ................. Refer to Table 1, Air cleaner clogged ................. Clean a_ necessary,, Compression insufficient Disassemble, check and replac_ {piston ring stuck or ............... if necessary, worn out) Cylinder chrome plating Replace cylinder, _-- peeled or worn out ................. Exhaust port clogged with carbon ........................ Clean as nec_ssary_ Throttle is not fully Readiust,
o SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure t5 39 29 44 52 24 38 22 36 3O 2! 23
KEY NO, 2 3 4 5 6 7 8 9 10 11 12 13 14 t5 16 17 t8 19 2O 2t 22 23 24 25 26 27 28 29 3O 31 32 33 34 35 36 37 38 39 PART NO. NF04S-0150A NF04S-1101 *RB N F04S-! 102-RB N F04S-1104F N F04S-1107A F L40-11098-PB NF04S. 1114 N F04S-1115 FH04S-t 104 FL40-1110 0420 22998 0 F L40-201 IA-RB FL40-2012A NF40-2101A EC02_083 EC02_644 FL40-3101A FL40-3102 FL40-5011 FL40-S012 EC02-720 00113 0618 0 00165 0612 0 00218 05O0 0 00218 0600 0 00218 1000 0 00227 0400 0 00310 0500 0 00311 0600 o 00311 1oo0 o 00312 0500 0 00312 0600 0 00320 O4O0 0 00320 0500 0 00320 0600 o 00320 1000 0 00431 05t4 0 00431 05t2 0 00435 0516 0 SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure 15 QTY. OESCRIPT!ON t Muffler mounting plate ass'¥ 1 Volute case (frontl ! Voluse case (rear) I Ben I tube 2 Screw (MS x 67) 1 Engine cover 1 impeller spacer 1 Cover t Plug 1 |repeller 1 Plug (rubber} 1 Frame compl. 1 Shoulder pad compl. 2 Vibration-proof rubber t Fuel lank cop ass°y (|ncl. t6} 1 Packing A 1 Fuel tank I Fuel-line hose 1 Throttle lever 1 Throttle wire 1 -SLop l_u _on 4 8o1_ (M6x 18) 3 Bolt (M6 x 12) g Nut (MS) 5 Nut (M.6) 1 NuL_!MIo 1 Nut (M4) 4 Washer (M5) B Washer (M6) Washer (M10) 4 Washer (M5} 4 Washer (M6} 1 Spring washer (M4} 2 Spring washer (MS) 10 Spnng washer (M6) t Spring washer (M 10) 4 Screw (pan head) (MS x 14) t :Screw (pan head) (M5 x 12) 7 Screw a_'v (M5 x 18} KEY PART NO. NO. QTY. 40 00431 06t 0 0 2 41 00431 0616 0 4 42 00628 3085 0 I 43 EC03-6103 1 44 _ FL40-3103 1 45 F L40-9106 1 46 0561 13998 2 2 47 064! 27999 0 t 48 EC05A-6111 # 49 RS0211-202B-RB 2 50 N B30K*6103 2 51 P503-5111 t 52 00436 05t2 0 I j_ DESCRIPTION Screw (pan head) (M6 x 10) Screw (pan head) (M8 x 16} 0 ring Fuel-llne hose prozecl|on tube P1_te Label Clamp (Hose} Fuel sIratner Packing Pla_e Vibration-proof rubber Plug (rubber) Screw ass'y
SEARS POWER BLOWER PARTS LIST-MODEL 636,796912 Figure 16 37 20 ⢠21 \ \ 24 23 48 4O 44 \ 32 27 28 26 31 36 3O 29 2 \ 38-39 17 _:_1516 19 5 I 1 3
KEY NO. ! 2 3 4 5 6 7 B 9 10 11 12 13 14 15 16 t7 18 19 20 2t 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 PART NO. QTY. EC04_072 1 0440 12999 i t 0440 15997 1 1 0600 15988 0 2 EC03-071 1 0119 05994 0 4 0105 06994 0 6 ECO4JDt 25 1 EC03-I09A ! EC04-091A 1 EC04-t{ 04c ! E C03-115 2 0119 05995 0 4 EC04-0222 1 EC04-206/28 I EC04-207A 1 EC04-2 t 0A 2 O565 11999 0 2 0610 12996 1 1 EC04-0516A 1 EC04-0513A 1 A50103212700 I 243051821009 4 451050600009 4 A54103200100 1 A55003210001 1 A60003200000 1 A60102600000 1 A5600260029t ! 141051251002 I A60503210000 ! A57120950000 1 A57202700000 1 EC04-0378 1 EC04-3122 I 00433 0520 0 3 F L40-910512A ! EC04-0718A 1 11100100100 1 SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure t6 DESCRIPTION Crank case ass'v (Incl. 2 Ihru 7) Oil seal (front} Oil seal (rear) Ball bearing Crank case packing Bob (socket head) (M5 x 30| Stud {M6) Cylinder cornpt. (Incl. 7) Cylinder packing Reed ass'y Carburetor bracket Reed bracket packing Boll (socket head} (MS x 18) Crank shall ass'y Piston Piston pin Piston ring Clip Needle bearing Recoil starter compI. {Incl. 21 thru24! RecoiI starter ass'y (incl. 25 thtu 33 | Starter case B Screw (MS x 18) Washer (M5} Reel Ratchet Spiral spring Frtction spring Frici|on plate Bind screw (M5 x 12) Return spring Statler rope Starter knob Muffler compl. Mu f fief gasket S_rew ass'y (M5 x 20} Label (model) Magneto comp{. (incl. 39. 401 Flywheel KEY PART NO, NO. QTY. 40 11400331000 1 41 KM61_B8e 1 42 0650 14995 0 1 43 0t70 08996 0 I 44 0203 08999 0 1 45 - 00218 0600 0 6 46 00310 0800 0 1 47 00320 0600 0 6 48 00434 0420 0 2 49 00532 0310 0 t 50 0566 05998 0 1 51 00310 0500 0 I 52 00431 0510 0 1 53 00532 0320 0 t 54 ECO4_379ATA 1 55 0043104100 1 56 0022704000 I DESCR IPTION Ignition coil Plug cap Spark plug Nut {left} {M8) Spring washer (M8) Nut (M6) Washer (MS| Spring washer (M6) Screw ass'V (M4 x 20) Woodruff key Clamp Washer (M5) Screw (pan head) (M5 x t0) Woodruff key Spark attester Screw (pan head) {M4 x 10) Nut (M4) o_
SEARS POWER BLOWER PARTS LIST- MODEL 636.796912 Figure t 7 / 35 33 1 18 27 26 29
KEY NO. ! 2 3 4 5 6 7 8 9 1t 12 13 14 15 16 t7 _8 t9 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 PART NO. EC04-O682A CKI31 832-16001 J8-3 N05 MDt4140 VM14ci,/38b VMI5124A VMI6/200 VM12143 MD13/44 M21/t5 VM241148 Nt02-22t VMt 5/I 73 VM15/353 VM151264 VM15/351 VM131139 852-00031 EC03-S0Ol 0 VM13i68A VM131326 B2--0830 B34183 VM131215 VM15/331 VM18i164A CW2_0416 VMI51348 VM13/210 CW2"0414 EC04-O335B 0736 36998 0 00436 0410 0 EC04-3304A EC04-3305 SEARS POWER BLOWER PARTS LIST- MODEL 636.796912 Figure 17 QTY. I t 1 ! ! 1 1 1 1 1 1 1 ! 1 1 1 1 I 1 1 1 I I 1 1 1 1 2 1 1 2 1 1 4 1 2 DESCRIPTION Carburetor compl. (Incl. 2 thru 31} Cock body ass'y Piston _r_lve (#1"0) Jet needle E ring Spring seat Spring Top Cap Cable guide Cable _djuster lock nut Cable adjuster Main jet (#77.5) Needle ass*y Float arm Float pin Gasket Float Float chamber body Guido screw assay O ring Clip Bolt Washer Nut Spring Throttle stop screw Spring washer cross screw Gasket Filter Spring we=her cross screw Air cleaner oss'y (Incl. 33, 35, 36) Labe_ Screw ass'y (M4 x tO) Air cleaner cap Element
SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure I8 °\ \ \ 7 \ I1
SEARS POWER BLOWER PARTS LIST - MODEL 636.796912 Figure 18 KEY NO. t 2 3 4 5 6 7 8 9 10 1t 12 13 14 15 PART NO, N F04S_09031t FL40-9001 N F31-097B N F04S-9121 F L40-9120 F L40-9121 NF40-7120 FL40-9012 FL40-9014 0717 04999 0 6619501201 0700 00994 0 0715 06999 0 07t3 21999 0 07t 0 08999 0 OTY. 1 1 I t 2 1 1 1 1 1 1 t t 1 I DESCRIPTION Wing hose band (big) Shou|dor band ass'y Wing hose band Corrugated pipe Straight pipe End pipe Hose clamp Swivel joint Tool kit (Inc1.10,12 thrul 5) Wrench (socket head} Owner's manual (FL40-9107!4) Tool bag PLus driver Box wrench(21 MiM ) Double,end wrench (8 x t0 M/M) ..& -M
OWNER'S MANUAL MODEL NO. 636.796912 HOW TO ORDER REPAIR PARTS I SEARS POWER BLOWER 1N 2_ 3, The model number of your power blower is located on the label on recoil starter of the engine. The serial number of your power blower is located on the label on the fan housing. When ordering repair parts, always give the following information: (1) Model number: 636.796912 (2) Name of item: 37.7 cc GAS POWER B LOWE R (3) Part number (4) Part description All parts listed may be ordered from any Sears Service Center or most Sears stores. (1) If the parts you need are not stocked Iocally, your order wilt be electronically transmitted to a Sears Repair' Parts Distri- bution Center for' handling, 6619501201 Sold by Sears, Roebuck and Co,, Chicago, IL60684 U.S.A. Printed in Japan