© 2011 ICS | Blount, Inc. Specifications and pricing are subject to change without notice. P/N 550416 REV06012011
660GC SERVICE MANUAL
73
22. CARBURETOR TUNING
22.7 With a tachometer check the saw full
throttle rpm, with a bar and no chain:
A Target = 12,500 ± 500 rpm
22.8 If the full throttle rpm falls below
this range, turn the H screw in
(clockwise) 1/16
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.
