ICS 603GC, Shop Manual

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603GC SHOP MANUAL
72
Copyright © May 24, 2006 ICS, Blount Inc.
22.3 Using a 5/64” straight blade
screwdriver, gently turn the
adjustment screws clockwise
until completely closed.
22.4 Set the adjustment screws at
the Basic Setting:
H = turns from closed
L = turns from closed
The side cover must be held
tightly in place with the side
cover nuts, using a bar and no
chain. Failure to do so may result
in personal injury.
22.5 Start the saw and warm up
the engine.
22.6 With a tachometer check the saw
rpm, with bar and no chain:
A Idle = 3,000 ± 300 rpm
B If the idle rpm does not fall into this
range, adjust the T screw, clockwise
to raise RPM, counterclockwise to
lower RPM.
22.7 With a tachometer check the saw full
throttle rpm, with no bar and chain:
A Target = ,000 ± 500 rpm
22.8 If the full throttle rpm falls below this
range, turn the H screw in (clockwise)
/6
th
of a turn at a time.
A Pulse the throttle to help stabilize
the system.
Do not hold the saw at max
rpm for more than 5 seconds or
cylinder damage could occur.
22. CARBURETOR TUNING