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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).
TO ADJUST REMOTE THROTTLE*
[1] Loosen casing clamp screw on carburetor or on
control lever bracket.
[2] Move governor control lever, wire, and casing as
far as possible in direction shown.
[3] Move remote throttle control to FAST.
[4] Tighten casing clamp screw.
CASING
CLAMP
SCREW
WIRE &
CASING
WIRE &
CASING
CASING
CLAMP
SCREW
GOVERNOR
CONTROL LEVER
* Manual choke or manual throttle control needs no
adjustment.
TO ADJUST REMOTE STOP SWITCH
[1] Governor control lever should make good contact with
remote stop switch (if equipped). Readjust if necessary.
[2] Check operation of throttle control.
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.
[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 1500 rpm (use a tachometer).
IDLE SPEED
ADJUSTING SCREW
THROTTLE
LEVER
THROTTLE
STOP
* The idle mixture valve on this engine is not adjustable.
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.