Briggs & Stratton Engine Model 400000 440000 MS3874 Instructions Manual

Operating & Maintenance Instructions
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Note: (This note applies only to engines used in the U.S.A.) Maintenance, replacement or repair of the emission control devices and systems may be performed
by any nonroad engine repair establishment or individual. However, to obtain no charge repairs under the terms and provisions of the Briggs & Stratton
warranty statement, any service or emission control part repair or replacement must be performed by a factory authorized dealer.
How To Use Manual Figures
−refer to figures inside covers.
−...

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Unintentional  sparking can result in fire or electric
shock.
Unintentional start-up can result in entanglement,
traumatic amputation, or laceration.
BEFORE PERFORMING ADJUSTMENTS OR RE-
PA I R S
•Disconnect spark plug wire and keep it away from
spark plug.
•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.
WARNING
Engines give off carbon monoxide, an odorless,...

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Check fuel level.
Before refueling, allow
engine to cool 2 minutes.
Clean around fuel fill before removing cap to refuel.
Remove cap. Fill tank to approximately 1-1/2 inches
below top of neck to allow for fuel expansion. Be careful
not to overfill.
Starting (see figs. )
ALWAYS KEEP HANDS AND FEET
CLEAR OF EQUIPMENT MOVING PARTS.
Do not use a pressurized starting
fluid. Vapors are flammable.
Start, store and fuel lawn mower in level position. Start
lawn mower on hard surface or over previously cut...

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 Maintenance Schedule
Follow the hourly or calendar intervals, whichever
occur first. More frequent service is required when
operating in adverse conditions noted below.
First 8 Hours

Change oil
Every 8 hours or daily

Check oil level

Clean around muffler, linkage and springs
Every 25 hours or every season

Change oil if operating under heavy load or
high ambient temperature

Replace air cleaner pre-cleaner*
Every 50 hours or every season

Change oil

Clean Extended Life Series™ air cleaner...

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California, United States and Canada Emissions Con-
trol Defects Warranty Statement
The California Air Resources Board (CARB), U.S. EPA and
B&S are pleased to explain the Emissions Control System
Warranty on your small off-road engine (SORE). In Califor-
nia, new small off-road engines model year 2006 and later
must be designed, built and equipped to meet the State’s
stringent anti-smog standards. Elsewhere in the United
States, new non-road, spark-ignition engines certified for
model year 1997 and...

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BRIGGS & STRATTON ENGINE OWNER WARRANTY POLICY
Effective 12/06
LIMITED WARRANTYBriggs & Stratton Corporation will repair or replace, free of charge, any part(s) of the engine that is defective in material or workmanship or
both. Transportation charges on parts submitted for repair or replacement under this warranty must be borne by purchaser. This warranty is ef-
fective for and is subject to the time periods and conditions stated below. For warranty service, find the nearest Authorized Service...



0.030”
(.76mm)



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