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ADJUSTMENTS
THROTTLE ADJUSTMENT
If the engine does not start or if it runs roughly, the remote
throttle control may need adjustment. See your authorized
Briggs & Stratton dealer or follow the instructions below.
WARNING
Prevent unintentional starting.
Before performing adjustments:
• Remove spark plug wire from spark plug.
• Disconnect battery at negative terminal (only
engines with electric start).
Manual choke or manual throttle control needs no
adjustment.
TO ADJUST REMOTE THROTTLE (remote choke)
[1] Loosen casing clamp screw on carburetor or
control plate.
[2] Push bell crank either way until it just touches
washer.
[3] Move throttle control to FAST position.
[4] Tighten casing clamp screw. Replace air cleaner.
BELL
CRANK
WASHER
CASING
CLAMP
SCREW
TO ADJUST REMOTE STOP SWITCH
[1] Lever on carburetor or control plate should make good
contact with remote stop switch. Readjust if necessary.
[2] Check operation of throttle control.
TO ADJUST REMOTE THROTTLE (manual choke)
[1] Loosen casing clamp screw on carburetor or on
control lever bracket.
[2] Move casing/wire in direction of arrow to end of travel.
[3] Move throttle control to FAST position.
[4] Tighten casing clamp screw. Replace air cleaner.
CASING/WIRE
CASING
CLAMP SCREW
CARBURETOR ADJUSTMENT
WARNING
The manufacturer of the equipment on which this
engine is installed specifies top speed at which the
engine will be operated. DO NOT EXCEED this speed.
Air cleaner and air cleaner cover must be assembled to
carburetor before starting engine. (Air cleaner is shown
removed in illustration below for clarity ONLY.)
The carburetor on this engine is equipped with an idle
speed adjustment screw.
TO ADJUST CARBURETOR
Governed idle has been set to 1750 rpm at the factory. The
idle mixture valve on this engine is not adjustable.
[1] To adjust idle speed, start engine and warm up
about 5 minutes.
[2] Then with engine running, place equipment throttle
control in SLOW position.
[3] Rotate carburetor throttle lever against the throttle
stop and hold it while adjusting the idle speed screw
to obtain 1100 rpm (use a tachometer).
IDLE SPEED SCREW
NON-ADJUSTABLE
IDLE MIXTURE VALVE
THROTTLE
STOP
THROTTLE
LEVER
Note: Engines operated at approximately 3000 to 5000
feet (900 to 1500 meters) above sea level may require a
high altitude carburetor pilot jet. If erratic performance is
observed, contact a Briggs & Stratton Authorized Service
Dealer for cost to install/purchase a high altitude carburetor
pilot jet, if available.