Briggs & Stratton 405700 - Manual (Page 5)

In the USA and Canada, a 24 hour hot line, 1-800-233-3723, has a menu of pre-recorded messages offering you engine maintenance information.
5
Adjustments
Control adjustments
WIRE
To prevent accidental starting when
adjusting controls, remove spark plug
wires from spark plugs and disconnect
battery at negative terminal.
To adjust choke control:
Remove air cleaner. Move choke control to CHOKE or
START position. Carburetor choke should be completely
closed. If not, loosen casing clamp screw. Then pull casing,
wire and engine choke lever in direction of arrow to end of
travel. Tighten casing clamp screw. Replace air cleaner.
Choke control adjustment
PULL
TO CHOKE
WIRE AND
CASING
SCREW
To adjust throttle control:
Remove air cleaner. Move throttle control to FAST position.
Swivel should be against throttle stop. If not, loosen casing
clamp screw. Pull casing and wire in direction shown by arrow
until swivel rotates against throttle stop. Tighten casing clamp
screw.
Throttle control adjustment
CASING
CLAMP
SCREW
THROTTLE STOP
SWIVEL
Carburetor adjustments
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.
The carburetor on this engine is low emission. It is not adjust-
able, except for idle speed. Governed idle speed is 1750 rpm,
set at the factory.
Adjustments
If idle speed does require adjusting, start engine and warm up
approximately 5 minutes before adjusting. With engine
running, place throttle control in SLOW position. Rotate
carburetor throttle lever against the idle speed screw and hold
it. Turn idle speed screw to obtain 1500 rpm. Release carbu-
retor throttle lever. Move throttle control to FAST position.
Engine should accelerate smoothly.
CARBURETOR
THROTTLE
LEVER
IDLE SPEED
SCREW
Carburetor adjustments
Note: Engines operated at approximately 3000 to 5000 feet
(900 to 1500 meters) or above sea level may require a high
altitude carburetor air bleed. If erratic performance is
observed, contact a Briggs & Stratton Authorized Service
Dealer for a high altitude carburetor air bleed.