Poulan Chainsaw - Manual (Page 12)

ADJUSTING THE CARBURETOR
CAUTION: The chain could be moving during this procedure. Wear your protective gear and observe all of your
safety precautions.
The carburetor has been carefully adjusted at the factory
but due to changes in altitude and operating conditions,
your carburetor may require additional adjustments.
PRELIMINARY ! Stop the engine. Be sure you have fresh fuel mix at the proper gasoline/oii ratio (see mixing
instructions), and a screwdriver.
1. Remove the carburetor cover by loosening and
removing the 2 screws on either side of the choke
knob.
2. Find the 3 adjusting screws; idle speed screw (1), low
speed mixture screw (2) and high speed mixture screw
(3). Turn the low speed mixture screw and the high
speed mixture screw clockwise just until they stop.(DO
NOT TIGHTEN. YOU MAY DAMAGE THE NEEDLE
SEATS.)
3.Turn both screws — Low speed mixture screw and high
speed mixture screw one full turn counterclockwise.
Start the engine. If the engine stops, when the trigger is
not squeezed (idle position).............
CLOCKWISE
4. Turn the idle speed screw 1/2 turn ciockwise. (The
engine should idle without the chain turning when you
start the engine). Turning the idle speed screw clock­
wise increases idle speed. Turning it counterclockwise
decreases idle speed. Run the engine for a few minutes
to bring it up to operating temperature for the best
carburetor adjustment.
12
5. Turn the low speed mixture screw slowJy clockwise
until the RPM starts to drop. Then turn the low speed
mixture screw counterclockwise until the RPM speeds
up and then starts to drop again. Position the low
speed mixture screw at the mid point.
6. If the chain is turning at the best idle setting, turn the
idle speed screw counterclockwise until the chain
stops, it may be necessary to recheck the low speed
mixture screw for the best idle, after the idle speed has
been reduced.