Document: - page 14 (Black)
Screen angle and frequency: 45.0000, 150.0000
14
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 MANUAL FRICTION THROTTLE
• Loosen or tighten wing nut on control plate until
throttle control moves with some resistance and still
remains in desired position when engine is running.
THROTTLE
CONTROL
CONTROL
PLATE
WING
NUT
TO ADJUST REMOTE THROTTLE
[1] Loosen casing clamp screw on control plate.
[2] Move casing and wire in direction of arrow to end of
travel.
[3] Move remote throttle control to FAST.
[4] Tighten casing clamp screw.
CASING
CLAMP
SCREW
CASING
WIRE
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 and a non adjustable idle mixture
valve (see inset) and an idle speed adjustment screw. Only
the idle speed screw is adjustable.
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 idle
speed screw and hold it while adjusting the idle
speed screw to obtain 1300 rpm (use a tachometer).
NON-ADJUSTABLE
IDLE MIXTURE
VALVE
IDLE
SPEED
SCREW
CARBURETOR
THROTTLE
LEVER
Note: Engines operated at approximately 3000 to 5000
feet (900 to 1500 meters) above sea level may require a
high altitude 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.
