Poulan 1980-02 - Manual (Page 8)

w BE CAREFUL! The chain will be moving during thii
procedure.
1. Stop the engine.
2. Turn the high speed and low speed mixture screws clock­
wise until they stop. (Figure 10) Don't tighten
them, you may damage the needle seats!
3. Turn the high speed and low speed mixture screws one
full turn counterclockwise
4. Start the engine. If it stops, increase the idle speed by
turning the idle speed screw clockwise . (Figure 11)
5. Run the engine for a few minutes to bring it up to opera­
ting temperature.
6. Set the idle speed as fast as possible without the chain
moving. Turn the idle speed screw clockwise for
faster idle, counterclockwise for slower idle.
7. Squeeze the trigger quickly. If the engine stops, restart it.
The engine should accelerate without hesitating when the
trigger is squeezed. If it does not. turn the low speed
mixture screw counterclockwise 1/16 of a turn and
check the acceleration again. If the idle speed slows while
adjusting the low speed mixture, reset the idle speed as in
step 6. Continue step 7 until acceleration is smooth.
8. Make a test cut with the saw.
9. If the engine seems to smoke excessively in the cut, turn
the high speed mixture screw clockwise 1/16 of a
turn. Repeat step 8 and 9, if necessary. WARNING; The
high speed needle must never be less than 7/8 turn open.
Too lean of a setting will quickly ruin the engine.
10. If the engine seems to weaken or lose power in the cut.
^ \ \ Figure 11
Idle Speedz.
Adjustment
^1^
J_
turn the high speed mixture screw counterclockwise
1/16 of a turn at a time until the saw cuts smooth­
ly. The high speed mixture screw should not be open
more than VA turns (counterclockwise
) from the
stopped position in step 2.
11. Reset the idle speed (see step 6).
CHAIN SHARPENING
A.properly sharpened chain is the secret of effortless, trouble
free cutting. Your authorized dealer or authorized master ser­
vice center will be happy to answer your question on chain
sharpening and supply whatever materials you need. To avoid
any delay, while working, carry a spare sharp chain and do
your sharpening after you have completed cutting.
FILING CHISEL CHAIN
To properly sharpen your chain, you will need a fileholder, the
correct size file and jointer. Follow these instructions;
1. If possible, remove the chain from the saw and put it an a
saw chain filing vise. If you do not have a filing vise, tension
the chain up snugly on the guide bar.
2. There are three angles that must be maintained for a pro­
perly sharpened chain. These are; (a) 30° Top Plate Filing
Angle, (b) 60° Top Plate Cutting Angle, (c) and 75° Side
Plate Angle. All three angles can be maintained accurately
by using a No. 55047 Fileholder and holding it in the right
position.
v' !
' 30* —"
3. Using a 3/16" dia. file, press the flat side of the file holder
firmly against the top of the cutters.
4. Lower fileholder handle down 10°below horizontal position.
5. Maintain 30° mark on file holder parallel to the chain.
6. Push the file through the cutter, from inside out while
holding the holder in the position outlined above. Apply
pressure on the forward stroke only.
7. To set all depth gauges at the same level, place the jointer
over each depth gauge and file the depth gauge with a flat
file until it is level with the jointer, then round off the lead­
ing edge of each depth gauge.
8
63793 2/80 printed in U.S.A.