15
CHECKING OIL SUPPLY
After starting the engine, run the chain at medium speed
and see if chain oil scatters as shown (Figure 11). Tighten
cap if necessary.
1. Chain oil (Figure 11).
2. Chain oil port (Figure 12).
ADJUSTING THE CARBURETOR
The carburetor on your unit has been adjusted by the
factory, but may require fine tuning due to changes in
operating conditions.
Before adjusting the carburetor, make sure that you have
clean air/fuel filters and fresh, properly mixed fuel.
When adjusting, take the following steps:
Turn the engine off and screw in both H and L needle jets
until they stop. Never force. Then set them back the initial
number of turns as show below.
H needle jet: 1 3/8 rotations out (Figure 13).
L needle jet: 1 1/4 rotations out (Figure 13).
Start engine and allow it to warm up at half-throttle.
Turn L needle jet slowly clockwise to find a position
where idling speed is maximum, then set the needle back
a 1/4 turn counterclockwise.
Turn idle adjusting screw counterclockwise so that saw
chain does not turn. If idling speed is too slow, turn the
screw clockwise (Figure 13).
Make a test cut and adjust the H needle jet for best
cutting power, not for maximum speed.
Idle Adjusting Screw
H Needle Jet
L Needle Jet
Figure 11
Figure 12
Figure 13
Содержание YFG52-H
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