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7

Service Spark Plug

NOTICE Spark plugs have different thread lengths and
heat ranges. When changing a spark plug, use only the
specified replacement or engine damage could occur.

NOTE: In some areas, local law requires using a resistor
spark plug to suppress ignition signals. If this engine was
originally equipped with a resistor spark plug, use the same
type for replacement.

1.

Disconnect the spark plug wire.

2.

Remove and inspect spark plug for wear and damage.
Replace spark plug if electrodes are burned away or if
the porcelain is cracked.

3.

Do not sand-blast or bead-blast the spark plug. Clean
by scraping or wire brushing and then washing in a
commercial solvent.

4.

Using a wire gauge, check and set the gap (A) to the
value listed in

Section 14 - Engine Specifications.

8

5.

Install spark plug by hand and tighten finger tight. Then
torque to the value listed in

Section 14 - Engine

Specifications.

6.

Connect the spark plug wire.

Clean Air Cooling System

WARNING

Running engines produce heat. Engine parts, especially
muffler, become extremely hot.

Severe thermal burns can occur on contact.

Combustible debris, such as leaves, grass, brush, etc.,
can catch fire.

• Allow muffler, engine cylinder and fins to cool before

touching.

• Remove accumulated debris from muffler area and

cylinder area.

NOTICE Do not use water to clean the engine. Water
could contaminate the fuel system. Use a brush or dry
cloth to clean the engine.

This is an air cooled engine. Dirt or debris can restrict air
flow and cause the engine to overheat, resulting in poor
performance and reduced engine life.

1.

Use a brush or dry cloth to remove debris from the air
intake area (A).

2.

Keep linkage, springs and controls (B) clean.

3.

Keep the area around and behind the muffler (C) free
of any combustible debris.

4.

Use a brush, vacuum and/or compressed air to remove
debris from cylinder cooling fins.

After a period of time, debris can accumulate in the cylinder
cooling fins and cause the engine to overheat. This debris
cannot be removed without partial disassembly of the
engine. Have a Briggs & Stratton Authorized Dealer inspect

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Содержание 083100

Страница 1: ...e based on the data available at the time of publication Briggs Stratton Corporation reserves the right to change alter or otherwise improve the product or the product manuals at any time without prior notice Briggs Stratton offers two complementary publications to enhance understanding of engine technology maintenance and repair Neither publication however is a substitution for a recognized train...

Страница 2: ...This engine repair manual includes the following engine model MODEL 083100 ...

Страница 3: ...ION 5 CONTROLS AND GOVERNOR SYSTEM 6 SECTION 6 LUBRICATION SYSTEM 7 SECTION 7 CYLINDER HEAD AND VALVES 8 SECTION 8 PISTON RINGS AND CONNECTING ROD 9 SECTION 9 CRANKSHAFT CAMSHAFT AND FLYWHEEL 10 SECTION 10 CYLINDER AND CRANKCASE COVER 11 SECTION 11 GEAR REDUCTION UNIT 12 SECTION 12 STARTER 13 SECTION 13 EXHAUST SYSTEM 14 SECTION 14 ENGINE SPECIFICATIONS ...

Страница 4: ......

Страница 5: ...SECTION 1 GENERAL INFORMATION GENERAL INFORMATION 4 Engine Identification 4 Acronyms Abbreviations and Meanings 4 Order of Engine Assembly and Disassembly 4 3 1 ...

Страница 6: ...wheel Remove Breather 6 Rocker cover breather Remove Cylinder Head 7 Cylinder shield Disassemble Cylinder Head 7 Rocker arms Remove Cylinder Head 7 Push rods Remove Cylinder Head 7 Cylinder head Disassemble Cylinder Head 7 Valves springs and seals Remove Crankshaft and Camshaft 9 Crankcase cover Remove PTO Bearing 10 PTO oil seal Remove PTO Bearing 10 PTO bearing Remove Crankshaft and Camshaft 9 C...

Страница 7: ...2 Blower housing Install Rewind Starter 12 Rewind starter Assemble Carburetor 4 Assemble carburetor Install Carburetor 4 Carburetor Install Control Bracket 5 Governor control bracket Perform Static Governor Adjustment 2 Static governor adjustment Install Control Bracket 5 Air cleaner base Install Fuel Tank 4 Fuel tank Install Control Bracket 5 Control panel trim Change Air Filter 2 Air cleaner ass...

Страница 8: ...6 BRIGGSandSTRATTON COM 1 ...

Страница 9: ...k Fuel Filter 12 In Line Fuel Filter 13 Change Oil 14 Change Air Filter 15 Service Spark Plug 16 Clean Air Cooling System 16 Clean Combustion Chamber 17 Storage 17 ENGINE ADJUSTMENTS 17 Adjust Armature Air Gap 18 Carburetor 19 Adjust Idle Speed 19 Remote Choke and Throttle Controls 19 Adjust Remote Choke Control 19 Adjust Remote Throttle Control 20 Governor 20 Perform Static Governor Adjustment 20...

Страница 10: ... can result in personal injury Explosion hazard Fire hazard Explosion hazard Shock hazard Toxic fume hazard Hot surface hazard Chemical hazard Amputation hazard moving parts Meaning Symbol Meaning Symbol Thrown object hazard wear eye protection Kickback hazard Amputation hazard entanglement General Safety Messages Prior to work read and understand the section s of this manual that pertain to the j...

Страница 11: ...er fuel cap and air cleaner if equipped are in place and secured Do not crank engine with spark plug removed If engine floods set choke if equipped to OPEN RUN position move throttle if equipped to FAST position and crank until engine starts When Operating Equipment Do not operate this product inside any building carport porch mobile equipment marine applications or enclosure Do not tip engine or ...

Страница 12: ...rate equipment without protective housing or covers in place DO NOT wear loose clothing jewelry or anything that could become entangled in the equipment Tie up long hair and remove jewelry Keep hands and feet away from rotating parts WARNING Running engines produce heat Engine parts especially mufflers become extremely hot which could cause severe thermal burns or catching fire to combustible debr...

Страница 13: ...ry All fuel components should be in good condition and properly maintained Repairs should only be made with factory approved parts Repair work should be done by a qualified technician Flexible supply lines should be checked regularly to make sure they are in good condition WARNING Prolonged or repeated contact with used motor oil could cause injury Used motor oil has been shown to cause skin cance...

Страница 14: ... this engine is EM Engine Modifications High Altitude At altitudes over 5 000 feet 1524 meters a minimum 85 octane 85 AKI 89 RON gasoline is acceptable For carbureted engines high altitude adjustment is required to remain emissions compliant Operation without this adjustment will cause decreased performance increased fuel consumption and increased emissions Contact a Briggs Stratton Authorized Ser...

Страница 15: ...k for dirt or debris clean or replace as necessary 8 Install cleaned or new fuel filter and o ring into fuel tank Torque fuel filter to the value listed in Section 14 Engine Specifications NOTE Make sure o ring is seated in groove of fuel filter 9 Check the fuel line for cracks or leaks Replace if necessary 10 Install fuel line with clamp onto fuel filter making sure clamp retains fuel line secure...

Страница 16: ...ghly wash exposed areas with soap and water Used oil is a hazardous waste product and must be disposed of properly Do not discard with household waste Check with your local authorities service center or dealer for safe disposal recycling facilities Place engine level Clean the oil fill area of any debris See Section 14 Engine Specifications for oil capacity 1 Drain fuel tank by running engine unti...

Страница 17: ...1 Remove knob A from air cleaner cover B then remove air cleaner cover 2 Remove nut C from air filter assembly D and E or G H and J then remove air filter assembly 3 Remove foam pre cleaner E from air filter cartridge D 4 Gently tap air filter cartridge on a hard surface to loosen debris Replace cartridge if very dirty 5 Wash foam pre cleaner in warm soapy water then rinse and allow to air dry 6 F...

Страница 18: ...m WARNING Running engines produce heat Engine parts especially muffler become extremely hot Severe thermal burns can occur on contact Combustible debris such as leaves grass brush etc can catch fire Allow muffler engine cylinder and fins to cool before touching Remove accumulated debris from muffler area and cylinder area NOTICE Do not use water to clean the engine Water could contaminate the fuel...

Страница 19: ...d or cylinder head These marks are normal and will not affect engine operation Storage Fuel can become stale when stored over 30 days Stale fuel causes acid and gum deposits to form in the fuel system or on essential carburetor parts To keep fuel fresh use Briggs Stratton Advanced Formula Fuel Treatment Stabilizer available wherever Briggs Stratton genuine service parts are sold There is no need t...

Страница 20: ...the blower housing to the engine 10 7 Carefully remove the blower housing from the engine and set aside 8 Turn flywheel so magnet is away from armature legs 9 Loosen two screws J and K 10 Slide Armature H away from flywheel 11 Tighten screw K to secure Armature 12 Turn flywheel so magnet is aligned with armature legs G 11 13 Insert a gauge 0 008 0 016 in 0 2 0 4 mm thick between the flywheel and t...

Страница 21: ...manual remote choke and speed control Adjust Idle Speed 1 Attach a tachometer to the engine per the manufacturer s instructions A Use Digital Tachometer Hour Meter p n 19598 Commercial Tachometer p n 795193 or the Treysit Sirometer p n 19200 2 Start and run engine for five minutes to warm up engine before making adjustments B 3 Move throttle control lever to slow position C 4 Hold throttle lever D...

Страница 22: ...le speed adjustment and top no load speed adjustment Be sure to complete all steps Perform Static Governor Adjustment 1 Drain fuel tank by running engine until fuel tank is empty 2 Disconnect the spark plug wire from the spark plug 3 Remove the air cleaner assembly as instructed in Change Air Filter found in this section 4 Remove the control panel trim and fuel tank as instructed in In Tank Fuel F...

Страница 23: ...s B 4 Move throttle control lever to fast position C 5 Adjust Top No Load Speed adjustment screw to obtain the engine speed determined in Step 1 D 18 Combustion Chamber Remove combustion chamber deposits every 500 hours or whenever the cylinder head is removed With the piston at Top Dead Center TDC scrape deposits from top of piston and upper bore with a plastic scraper Remove the loosened deposit...

Страница 24: ...k in the cylinder or scratch the piston head 5 Check valve clearance using a feeler gauge A If valve adjustment is necessary hold rocker ball nut D with a wrench and loosen jam nut E then adjust rocker ball nut to obtain the clearance F listed in Section 14 Engine Specifications 6 Hold rocker ball nut and tighten the jam nut E to the torque value listed in Section 14 Engine Specifications 7 Check ...

Страница 25: ...SECTION 3 TROUBLESHOOTING SYSTEMIC CHECK 24 Check Ignition 24 Check Carburetion 25 Check Compression 25 ELECTRICAL SYSTEMS 25 Equipment Used for Testing 26 Oil Gard System 26 23 3 ...

Страница 26: ...equipment Grass build up under deck No lubrication in equipment gear box Excessive belt tension Once equipment sources are ruled out the cause for most of these symptoms can be determined by performing a systems check in the following order 1 Ignition 2 Carburetion 3 Compression This check up can usually be completed in a matter of minutes and is the quickest and most reliable method of determinin...

Страница 27: ...hrough the carburetor is to remove the spark plug and pour a small quantity of gasoline through the spark plug hole Replace the plug If the engine fires a few times and then stops look for the same conditions as for a dry plug Check Compression Use Leakdown Tester 19545 to check the sealing capabilities of the compression components Follow the instructions provided with the tester to perform the l...

Страница 28: ...d systems the DC Shunt 19468 is required to avoid blowing a fuse in either of the meters 22 Tachometer Tachometer p n 19200 A or p n 19598 B are available from your Briggs Stratton source of supply 23 Starter Motor Test Fixture A starter motor test fixture may be made from 1 4 6 mm steel stock 1 Drill two 3 8 10 mm holes for starter mounting bracket B 2 Using same spacing drill an additional 3 8 1...

Страница 29: ...o sensor wire 7 Connect other test lead to base of cylinder If meter reads near zero resistance replace sensor in cylinder If meter reads more than near zero resistance proceed to Step 8 8 Reconnect module wire to sensor wire 9 Disconnect module wire to wire harness 10 With module wire disconnected and not touching ground try to start the engine If engine starts replace module If engine does not s...

Страница 30: ...28 BRIGGSandSTRATTON COM 3 ...

Страница 31: ...30 Remove Fuel Tank 31 Inspect Fuel Tank 31 Install Fuel Tank 31 CARBURETOR 32 Carburetor and Carburetor Overhaul Kit 34 Remove Carburetor 34 Disassemble Carburetor 34 Inspect and Clean Carburetor 34 Assemble Carburetor 34 Install Carburetor 34 29 4 ...

Страница 32: ...FUEL TANK 27 30 BRIGGSandSTRATTON COM 4 ...

Страница 33: ... other ignition sources because they can ignite fuel vapors Remove Fuel Tank 1 Drain fuel tank B by running engine until fuel tank is empty 2 Disconnect spark plug wire from spark plug N Secure spark plug wire away from spark plug 3 Remove the air cleaner cover J and air filter K For detailed instructions and air cleaner variations refer to Change Air Filter found in Section 2 4 Remove the control...

Страница 34: ...ank B onto engine Install screw A nuts H and control panel trim screw M Torque screws to the value listed in Section 14 Engine Specifications 4 Install the air filter K and air cleaner cover J For detailed instructions and air cleaner variations refer to Change Air Filter found in Section 2 5 Reconnect the spark plug wire to the spark plug N 6 Partially fill tank with fuel and check for leaks repa...

Страница 35: ...CARBURETOR 28 33 4 ...

Страница 36: ...evidence of wear or damage If found replace the entire carburetor assembly 2 Inspect choke shaft choke valve throttle shaft and throttle valve for evidence of wear or damage Replace parts as necessary 3 Using Carb Choke Cleaner p n 100041 p n 100042 or ultrasonic cleaner thoroughly clean the following components then follow with compressed air to dry Passages in the main jet Inside and outside of ...

Страница 37: ...to studs until it is against the engine Slide new gasket Y onto studs NOTE Make sure gasket is properly orientated on carburetor An improperly orientated gasket will cause poor engine performance Refer to illustration at the beginning of the carburetor section 3 Install spring E onto throttle lever G 4 Install fuel line B with clamp onto carburetor fitting Make sure clamp retains fuel line securel...

Страница 38: ...36 BRIGGSandSTRATTON COM 4 ...

Страница 39: ...SECTION 5 CONTROLS AND GOVERNOR SYSTEM CONTROL BRACKET 38 Remove Control Bracket 39 Install Control Bracket 39 GOVERNOR SYSTEM 39 Top No Load Speed 41 Disassemble 41 Inspect 41 Assemble 41 37 5 ...

Страница 40: ...CONTROL BRACKET 29 38 BRIGGSandSTRATTON COM 5 ...

Страница 41: ... of the governor spring G was removed from the engine connect it to the marked hole that it was removed from 2 Install control bracket using the two control bracket screws H and J NOTE Refer to the illustration and install screw H the shorter screw and screw J the longer screw in the proper location Torque screws to the value listed in Section 14 Engine Specifications 3 If equipped install the rem...

Страница 42: ...GOVERNOR SYSTEM 30 40 BRIGGSandSTRATTON COM 5 ...

Страница 43: ...nkshaft and Camshaft found in Section 9 Inspect 1 Rotate governor crank C away from governor gear assembly B 2 Check governor crank for excessive wear or damage replace if necessary 3 Check governor cup E for cracks or breaks replace if necessary 4 Check governor gear D for chipped or damaged teeth NOTE If the governor gear assembly is damaged the engine must be replaced There are no replacement p...

Страница 44: ...42 BRIGGSandSTRATTON COM 5 ...

Страница 45: ...SECTION 6 LUBRICATION SYSTEM BREATHER AND LUBRICATION SYSTEM 44 Breathers 45 Service Breather 45 Lubrication System 45 OIL GARD SYSTEM 45 Oil Gard System 47 43 6 ...

Страница 46: ...BREATHER AND LUBRICATION SYSTEM 31 44 BRIGGSandSTRATTON COM 6 ...

Страница 47: ...er hose Air should flow freely through the valve 3 If air flow is restricted under vacuum at the breather hose or has no resistance when blowing on the breather hose replace the rocker cover Install Breather 1 Slide breather hose D completely onto hose connection on air cleaner base 2 Place new gasket G and rocker cover E on cylinder head B 3 Install four screws F and torque to values listed in Se...

Страница 48: ...OIL GARD SYSTEM 32 46 BRIGGSandSTRATTON COM 6 ...

Страница 49: ... Sense will stop a running engine if the oil level runs below the ADD level on the dipstick The engine can be restarted but will only run briefly Troubleshooting In engines equipped with a Run Sense system if the engine halts during operation or will not remain running upon starting check oil level if oil level is at FULL and engine continues to halt the module is faulty or the internal cylinder f...

Страница 50: ...48 BRIGGSandSTRATTON COM 6 ...

Страница 51: ...SECTION 7 CYLINDER HEAD AND VALVES CYLINDER HEAD AND VALVES 50 Remove Cylinder Head 51 Disassemble Cylinder Head 51 Inspect Cylinder Head 51 Assemble Cylinder Head 52 Install Cylinder Head 53 49 7 ...

Страница 52: ...CYLINDER HEAD AND VALVES 33 50 BRIGGSandSTRATTON COM 7 ...

Страница 53: ...n and orientation of each for proper installation later 10 Using a plastic scraping tool carefully clean all traces of head gasket from the head and cylinder mating surfaces 34 Disassemble Cylinder Head 1 Remove jam nuts R and rocker nuts S from rocker arm studs U then remove rocker arms T 2 Remove rocker arm studs U and push rod guide plate W 3 Support valve side of cylinder head on clean shop to...

Страница 54: ...ly available valve grinder However Briggs Stratton does not recommend this practice because the quality of the resurfacing may be insufficient 4 Using Valve Lapping Tool 19258 and Lapping Compound 94150 lap valve and seat together to assure a good sealing surface Remove valve and repeat procedure for the exhaust valve 38 5 Thoroughly clean both valves and cylinder head of all lapping compound resi...

Страница 55: ...E Do not fully torque each screw in one step as it may result in a warped cylinder head Step torque all screws to approximately 1 3 of final torque value then to 2 3 final torque value then finish at final torque value 4 Install push rods V through guides X and into same positions as removed Ensure push rods are seated in valve tappets as shown in the following illustration 39 5 Install valve cap ...

Страница 56: ...54 BRIGGSandSTRATTON COM 7 ...

Страница 57: ...S AND CONNECTING ROD 56 Remove Piston and Connecting Rod 57 Disassemble Piston and Connecting Rod 57 Inspect Piston and Pin 57 Check Ring End Gap 58 Inspect Connecting Rod 58 Assemble Piston and Connecting Rod 58 Install Piston and Connecting Rod 59 55 8 ...

Страница 58: ...PISTON RINGS AND CONNECTING ROD 40 56 BRIGGSandSTRATTON COM 8 ...

Страница 59: ...ide out piston pin R from connecting rod and piston Remove connecting rod from piston 3 Using Piston Ring Expander 19340 remove the top compression ring P and then the center oil wiper ring N Note the order and orientation of the rings before removal 42 4 Remove the bottom oil control ring M by hand as follows Grasp one end of the upper steel rail and wind the rail from the oil ring groove into th...

Страница 60: ...nd or cylinder bore However the original rings can be re used if they are not damaged and are checked as follows 1 Clean all carbon from the rings and the cylinder bore 2 Insert one of the original rings approximately one inch down the cylinder bore NOTE Slide the ring into the cylinder using the piston This will ensure that the ring is positioned square in the cylinder 45 3 Measure the ring end g...

Страница 61: ...trol ring M by hand as follows Grasp one end of lower steel rail and wind it over the top ring groove then into the center ring groove and finally into the oil ring groove Install the spring expander on top of the lower rail then install the upper steel rail 48 5 Using Piston Ring Expander 19340 install the center oil wiper ring N then the top compression ring P Follow the orientation noted at tim...

Страница 62: ... 6 Tighten screw closest to piston first then screw farthest from piston second Torque screws to values listed in Section 14 Engine Specifications NOTICE Failure to use a torque wrench can result in loose rods causing breakage or overtightened rods causing scoring 7 Rotate crankshaft two revolutions to ensure crankpin and rod do not bind 8 Move connecting rod sideways to ensure rod has clearance o...

Страница 63: ...ect Flywheel 63 Install Flywheel 63 CRANKSHAFT AND CAMSHAFT 63 Remove Crankshaft and Camshaft 65 Inspect Crankshaft and Camshaft 65 Inspect Crankshaft 65 Inspect Camshaft 65 Install Crankshaft and Camshaft 65 Install Crankcase Cover 65 Check and Adjust Crankshaft End Play 66 61 9 ...

Страница 64: ...FLYWHEEL 53 62 BRIGGSandSTRATTON COM 9 ...

Страница 65: ...burrs rust or other damage Inspect fan F for cracks and broken fins If parts are damaged replace with new parts Install Flywheel 1 Clean flywheel taper E and crankshaft taper D of grease oil and dirt 2 Install key A into keyway of crankshaft NOTICE Use only an original Briggs Stratton flywheel key 3 Slide flywheel E onto crankshaft D with keyways aligned 4 Install fan F against flywheel making sur...

Страница 66: ...CRANKSHAFT AND CAMSHAFT 57 64 BRIGGSandSTRATTON COM 9 ...

Страница 67: ...king Replace camshaft if any of these conditions are found 2 Using a micrometer measure the journal diameters Compare results to values listed in Section 14 Engine Specifications If wear exceeds the reject dimensions replace the camshaft Install Crankshaft and Camshaft 1 Lubricate the cylinder oil seal with engine oil 2 Make sure the paddle G on the governor shaft is rotated in line with the gover...

Страница 68: ...aft End Play When crankcase cover D is installed with a standard gasket C end play should match values listed in Section 14 Engine Specifications If end play is less than specified remove cover and install an additional gasket Do not use more than two gaskets If end play is more than specified replace the cover 66 BRIGGSandSTRATTON COM 9 ...

Страница 69: ...er 69 Recondition Cylinder Bore 69 Resize Cylinder Bore 70 Clean Cylinder 70 MAG Bearing 70 Inspect MAG Bearing 70 Remove MAG Bearing 70 Install MAG Bearing 71 Crankcase Cover 71 Inspect and Measure Cover 71 Clean Cover 71 PTO Bearing 71 Inspect PTO Bearing 71 Remove PTO Bearing 72 Install PTO Bearing 72 67 10 ...

Страница 70: ...CYLINDER AND CRANKCASE COVER 58 68 BRIGGSandSTRATTON COM 10 ...

Страница 71: ...e is distorted more than 0 004 0 1 mm the cylinder must be replaced 59 3 Using Telescoping Gauge 19485 and Dial Caliper 19609 measure the diameter of the bore If necessary recondition or resize the bore as described below 60 Take two measurements 90 apart at the top center and bottom of the piston ring travel Compare measurements to the standard cylinder bore size provided in Section 14 Engine Spe...

Страница 72: ...epeat washing and rinsing until all traces of honing grit are gone NOTE Honing grit is highly abrasive and will cause rapid wear to all of the internal components of the engine When cylinder and cylinder housing has been thoroughly cleaned use a clean white rag to wipe the cylinder bore and internal cylinder housing surfaces If honing grit is still present it will appear as a grey residue on the r...

Страница 73: ...ng driver tool that will not come into contact and damage the governor gear The governor gear is not a replaceable part 65 4 Press driver tool until bearing is seated in bore 5 Install new oil seal J until flush with cylinder housing 66 Crankcase Cover Inspect and Measure Cover 1 Remove oil seal and discard 2 Visually inspect cover for cracks stripped threads and wear in bearing surfaces If damage...

Страница 74: ...g D Press driver tool until bearing is extracted 69 Install PTO Bearing 1 Remove burrs and imperfections from PTO bearing bore in cover H Clean and lightly lubricate all PTO bearing bore surfaces in cover 2 Lubricate outside diameter of new PTO bearing D and position it on top of PTO bearing bore in cover 3 Place a bearing driver tool on the PTO bearing 70 4 Press driver tool until bearing is seat...

Страница 75: ...71 73 10 ...

Страница 76: ...74 BRIGGSandSTRATTON COM 10 ...

Страница 77: ...SECTION 11 GEAR REDUCTION UNIT GEAR REDUCTION UNIT 76 Disassemble Gear Reduction Unit 77 Inspect Gear Reduction Parts 77 Assemble Gear Reduction Unit 77 Fill Gear Reduction Unit with Oil 78 75 11 ...

Страница 78: ...GEAR REDUCTION UNIT 72 76 BRIGGSandSTRATTON COM 11 ...

Страница 79: ...for cracks tears or hardening Replace seals if necessary 2 Inspect crankshaft gear and drive shaft gear for worn cracked or chipped teeth Replace if damaged or worn 3 Inspect gear case and cover for cracks damaged mounting or damaged gasket surfaces Replace if damaged Assemble Gear Reduction Unit 1 Install gear reduction case oil seal H with sealing lip P toward outside of gear reduction case Q 75...

Страница 80: ...over over drive shaft until seated on new gasket NOTE Vent plug hole must be positioned at top 11 Install four cover screws A and torque to value listed in Section 14 Engine Specifications 78 12 Install the bottom oil drain plug E and torque to value listed in Section 14 Engine Specifications Fill Gear Reduction Unit with Oil 1 Remove oil level plug E on side of gear reduction unit and vent plug C...

Страница 81: ...79 79 11 ...

Страница 82: ...80 BRIGGSandSTRATTON COM 11 ...

Страница 83: ...ION 12 STARTER REWIND STARTER 82 Remove Rewind Starter 83 Replace Rewind Starter Rope 83 Disassemble Rewind Starter 84 Inspect Rewind Starter 84 Reassemble Rewind Starter 85 Install Rewind Starter 86 81 12 ...

Страница 84: ...REWIND STARTER 80 82 BRIGGSandSTRATTON COM 12 ...

Страница 85: ...er damage is found repair as instructed in this section prior to replacing starter rope 4 Hold rewind assembly firmly and pull out rope L until pulley G stops NOTE Spring tension in pulley will increase as rope is pulled out 81 5 Line up holes of rewind pulley N and rope eyelet P and secure pulley assembly with a screwdriver Q to prevent it from spinning 82 6 Cut through middle of rope L and then ...

Страница 86: ...or damage may occur to spring 5 Remove screw B and then remove the pawl friction plate C 6 Remove friction spring D 7 Remove two pawls F and two pawl springs E WARNING The starter spring is still under tension when the rope is removed and the pulley has no spring pressure against it Wear eye protection to prevent eye injury while disassembling and reassembling starter pulley and spring 8 Carefully...

Страница 87: ...ion pawl friction plate C on pulley then install shoulder screw B Torque screw to value shown in Section 14 Engine Specifications 6 While holding pawl friction plate rotate the pulley to extend and retract the pawls If they do not move properly remove and reinstall the friction plate 7 Turn pulley counterclockwise until the spring is wound tight Then allow pulley to unwind slightly until the hole ...

Страница 88: ...tall Rewind Starter 1 Install rewind starter assembly B through M on blower housing A and secure using screws K Torque screws to the value listed in Section 14 Engine Specifications Tip To ensure that pawls engage in flywheel cup evenly install screws loosely pull starter rope tighten screws and then release starter rope Torque screws to the value listed in Section 14 Engine Specifications 86 BRIG...

Страница 89: ...ct Exhaust System 89 Muffler Deflector 89 Remove Muffler Deflector 89 Inspect Muffler Deflector 89 Install Muffler Deflector 89 Spark Arrester 89 Remove Spark Arrester 89 Inspect Spark Arrester 89 Install Spark Arrester 90 Muffler 90 Remove Muffler 90 Inspect muffler 90 Install Muffler 90 87 13 ...

Страница 90: ...EXHAUST SYSTEM 94 88 BRIGGSandSTRATTON COM 13 ...

Страница 91: ... welds or breakage Check the muffler for split seams loose internal parts or cracked welds Replace any damaged parts with new original equipment parts Never reinstall broken or damaged components Muffler Deflector Remove Muffler Deflector 1 Prior to removing the muffler deflector note its orientation for reinstallation NOTE Orientation of muffler deflector should match the illustration at the begi...

Страница 92: ...ler 1 Check the muffler tube and flange for cracked welds or breakage 2 Check the muffler for split seams loose internal parts or cracked welds 3 Replace any damaged parts with new original equipment parts Never reinstall broken or damaged components Install Muffler 1 Clean mounting surfaces of muffler N and cylinder head J of any dirt debris and gasket material 2 Lightly coat threads of mounting ...

Страница 93: ...SECTION 14 ENGINE SPECIFICATIONS SPECIFICATIONS 92 91 14 ...

Страница 94: ... 16 N m Connecting Rod 71 124 lb in 8 14 N m Control Bracket 35 53 lb in 4 6 N m Control Panel Trim 89 106 ib in 10 12 N m Crankcase Cover 21 22 lb ft 28 30 N m Cylinder Head 71 124 lb in 8 14 N m Cylinder Shield 71 124 lb in 8 14 N m Flywheel Guard 54 59 lb ft 73 80 N m Flywheel Nut 71 124 lb in 8 14 N m Fuel Tank 62 71 lb in 7 8 N m Fuel Tank Outlet 71 124 lb in 8 14 N m Governor Lever Nut 16 22...

Страница 95: ... 1 021 in 25 93 mm 1 023 in 25 98 mm Crank Pin Journal 0 864 in 21 95 mm 0 866 in 22 00 mm Mag Side Journal 0 864 in 21 95 mm 0 866 in 22 00 mm PTO Side Journal CAMSHAFT 0 548 in 13 92 mm 0 550 in 13 97 mm Mag Side Journal 0 548 in 13 92 mm 0 550 in 13 97 mm PTO Side Journal CONNECTING ROD 1 026 in 26 06 mm 1 024 in 26 01 mm Crank Pin Bearing 0 514 in 13 06 mm 0 512 in 13 00 mm Piston Pin Bearing ...

Страница 96: ...94 BRIGGSandSTRATTON COM 14 ...

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