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).
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.
TO ADJUST REMOTE THROTTLE*
CASING | CASING | |
CLAMP | ||
CLAMP | ||
SCREW | ||
SCREW | ||
|
WIRE &
CASING
WIRE & | GOVERNOR | |
CASING | ||
CONTROL LEVER | ||
|
[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.
*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.
THROTTLE THROTTLE
LEVER STOP
IDLE SPEED
ADJUSTING SCREW
[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).
*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.
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