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Screen angle and frequency: 45.0000, 150.0000

MAINTENANCE

CLEANING DEBRIS

CAUTION:

Do not use water to clean engine parts.

Water could contaminate fuel system. Use a brush

or dry cloth.

Daily or before every use, clean accumulated debris from

engine. Keep linkage, springs and controls clean. Keep

area around and behind muffler free of any combustible

debris.

Engine parts should be kept

clean to reduce the risk of

overheating and ignition of accu-

mulated debris. This is especial-

ly important if cutting tall grass.

WARNING

Debris Guard or Rotating Screen

DEBRIS

GUARD

ROTATING

SCREEN

Linkage, Springs and Controls

CLEAN

Muffler and Spark Arrester

CLEAN

SPARK

ARRESTER

(IF EQUIPPED)

ADJUSTMENTS

CONTROL ADJUSTMENTS

WARNING

Prevent unintentional starting.
Before performing adjustments:

•

Remove spark plug wire from spark plug.

•

Disconnect battery at negative terminal (only

engines with electric start).

TO ADJUST REMOTE CHOKE CONTROL

[1] Remove

air

cleaner.

[2] Move choke control

to CHOKE or START position.

(Carburetor choke should be completely closed.)

[3] If not, loosen casing clamp screw.
[4] Then move casing, wire and engine choke lever

until choke is completely closed.

[5] Tighten casing clamp screw. Replace air cleaner.

CHOKE

CLOSED

CASING

CLAMP

SCREW

CHOKE

LEVER

Содержание 420000 Series

Страница 1: ... 9 10 Maintenance 11 14 Adjustments 14 15 Parts and Service Storage 16 Warranty Information 17 WARNING Briggs Stratton does not approve or authorize the use of these engines on 3 wheel All Terrain Vehicles ATVs motor bikes aircraft products or vehicles intended for use in competitive events Use of these engines in such applications could result in property damage serious injury including paralysis...

Страница 2: ... emission compliant for 500 hours of actual engine running time For example a typical walk behind lawn mower is used 20 to 25 hours per year Therefore the Emissions Durability Period of an engine with an intermediate rating would equate to 10 to 12 years The Air Index is a calculated number describing the relative level of emissions for a specific engine family The lower the Air Index the cleaner ...

Страница 3: ...epresent the type of hazard DANGER indicates a hazard which if not avoided will result in death or serious injury WARNING indicates a hazard which if not avoided could result in death or serious injury CAUTION indicates a hazard which if not avoided might result in minor or moderate injury CAUTION when used without the alert symbol indicates a situation that could result in damage to the engine WA...

Страница 4: ... with fuel tank EMPTY or with fuel shut off valve OFF WHEN STORING GASOLINE OR EQUIPMENT WITH FUEL IN TANK Store away from furnaces stoves water heaters or other appliances that have pilot light or other ignition source because they can ignite gasoline vapors Starting engine creates sparking Sparking can ignite nearby flammable gases Explosion and fire could result WARNING If there is natural or L...

Страница 5: ...lug Disconnect battery at negative terminal only engines with electric start WHEN TESTING FOR SPARK Use approved spark plug tester Do not check for spark with spark plug removed ENGINE INFORMATION TECHNICAL INFORMATION POWER RATINGS The power ratings for an individual engine model are initially developed by starting with SAE Society of Auto motive Engineers code J1940 Small Engine Power Torque Rat...

Страница 6: ...spect to the performance or operational life of this engine This engine is warranted solely according to the product and emissions warranties stated elsewhere in this manual MODEL SERIES 420000 Bore 3 7 16 in 87 31 mm Stroke 2 9 32 in 57 94 mm Displacement 42 33 cu in 694 0 cc MODEL SERIES 460000 Bore 3 9 16 in 90 49 mm Stroke 2 9 32 in 57 94 mm Displacement 45 48 cu in 745 2 cc TUNE UP SPECIFICAT...

Страница 7: ...ange intervals F 20 0 20 40 60 80 100 C 30 20 10 0 10 20 30 40 STARTING TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE 32 CAUTION Use 5W 30 oil or synthetic oil if anticipated temperatures are below 40 F 4 C to prevent internal engine damage at startup due to inadequate lubrication Air cooled engines run hotter than automotive engines The use of non synthetic multi viscosity oils e g 5W 30 i...

Страница 8: ...ills and emissions 2 Replace cap before starting Turn engine OFF and let engine cool at least 2 minutes before removing gas cap Fill fuel tank outdoors or in well ventilated area Keep gasoline away from sparks open flames pilot lights heat and other ignition sources If fuel spills wait until it evaporates before starting engine STARTING WARNING Do not use pressurized starting fluids Vapors are fla...

Страница 9: ...y until resistance is felt then pull rapidly to start engine and avoid kickback 6 Let engine warm up Choke Equipped Move choke control lever toward RUN a short dis tance at a time over sev eral seconds in warm weather or minutes in cold weather Let engine run smoothly before each change Operate with choke in RUN WARNING Rewind starter Rope starter TO STOP ENGINE 1 Move throttle if equipped to SLOW...

Страница 10: ...START CAUTION To prolong starter life use short starting cycles 5 seconds maximum then wait one minute Follow equipment manufacturer s recom mendations for charging battery 6 Let engine warm up Choke Equipped Move choke control lever toward RUN a short distance at a time over several seconds in warm weather or minutes in cold weather Let engine run smoothly before each change Operate with choke in...

Страница 11: ... cleaner 4 Service air cleaner car tridge if equipped with pre cleaner 4 Inspect spark arrester if equipped 4 Clean or replace spark plugs 4 Replace in line fuel filter if equipped 4 Clean cooling system 4 Clean combustion chamber 4 Change oil after first 5 to 8 hours of use then every 50 hours or every season Change oil every 25 hours when operating the engine under heavy load or in high temperat...

Страница 12: ...pstick add oil to bring level to FULL mark Restart engine and check oil pressure If pressure is normal continue to operate engine Note Oil pressure gauge if engine is equipped is supplied by manufacturer of equipment AIR CLEANER All engines have an oval air cleaner cartridge In addition some engines have a pre cleaner Pre cleaner To clean pre cleaner if equipped separate it from cartridge and wash...

Страница 13: ... in the same position as the original parts other wise fire can occur If muffler is equipped with spark arrestor screen remove screen for inspection Replace screen if damaged or plugged WARNING FUEL SYSTEM Replacement parts for fuel system cap hoses tanks filters etc must be the same as original parts otherwise fire can occur WARNING FUEL FILTER if equipped PART NO 394358 WITH FUEL PUMP PART NO 29...

Страница 14: ...s WARNING Debris Guard or Rotating Screen DEBRIS GUARD ROTATING SCREEN Linkage Springs and Controls CLEAN Muffler and Spark Arrester CLEAN SPARK ARRESTER IF EQUIPPED ADJUSTMENTS CONTROL ADJUSTMENTS WARNING Prevent unintentional starting Before performing adjustments Remove spark plug wire from spark plug Disconnect battery at negative terminal only engines with electric start TO ADJUST REMOTE CHOK...

Страница 15: ...000 feet 900 to 1500 meters above sea level may require a high alti tude carburetor main jet If erratic performance is observed contact a Briggs Stratton Authorized Service Dealer for cost to install purchase a high altitude carburetor main jet TO ADJUST CARBURETOR 1 Start engine and warm up approximately 5 minutes before adjusting 2 With engine running place throttle control in SLOW position 3 Ro...

Страница 16: ...ing more than 5 000 Master Service Technicians Look for these signs wherever Briggs Stratton service is offered You may locate your nearest Authorized Briggs Stratton Service Dealer in our dealer locator map on our web site or in the Yellow Pages directory under Engines Gasoline or Gasoline Engines or Lawn Mowers or similar category An illustrated shop manual includes com mon specifications and de...

Страница 17: ...e other rights which vary from state to state and country to country r Sleeve Bore Kool Bore r 45 Commercial Use 2 years 90 days 1 year Consumer Use 2 years 2 years 90 days 1 year 1 year Note the following special warranty periods 2 years for Classic engines in the European Union and Eastern European countries for all consumer products in the European Union and for emission control systems on engi...

Страница 18: ...extends only to the parts listed below the emission con trol systems parts to the extent these parts were present on the engine purchased a Fuel Metering System Cold start enrichment system Carburetor and internal parts Fuel Pump b Air Induction System Air cleaner Intake manifold c Ignition System Spark plug s Magneto ignition system d Catalyst System Catalytic converter Exhaust manifold Air injec...

Страница 19: ... 7 7 5 97 8 7 8 9 9 77 7 5 7 96 7 9 7 7 7 C 9 7 95 7 96 7 9 7 6 CE E 9 9 8 6 9 7 7 5 5 7 8 79 8 8 8 6 9 8 7 9 8 LM 9 8 7 97 MN 7 96 7 9 9 5 7 6 9 8 7 8 7 96 7 9 8 9 8 E 8 8 7 8 9 7 7 5 7 8 7 8 9 6 8 7 C 9 9 9 5 9 C 97 96 8 7 9 5 J5 7 7 7 7 9 B 96 7 9 7 8 8 7 9 96 7 9 8 7 7 7 5 8 7 6 9 7 6 8 8 98 6 7 3 66 7 6 8 7 7 9 C 9 8 98 5 6 8 9 9 9 8 5 9 8 8 7 7 7 6 7 5 8C 8 8 7 6 97 6 8 8 98 9 9 9 8 9 5 7 9 ...

Страница 20: ......

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