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© 2011 ICS- Blount Inc Specifications and pricing are subject to change without notice. P/N 525747 REV12Sep2012
680GC SERVICE MANUAL
23.1
Basic Setting:
H = 2 1/4 - 2 3/8 turns from closed.
L = 1 1/4 to 1 3/8 turns from closed.
23.2
Remove limiter cap.
A. Limiter caps can only be removed after
the cylinder cover and screw boot have been
removed. Observe orientation of the release
slots on the adjustment screw limiter cap.
See section 10 for cylinder cover removal.
B. Insert the limiter cap puller into the center
of the limiter cap.
C. Firmly hold the tool shaft while screwing
in the puller screw until the screw head is
against the puller shaft.
D. Unscrew the puller screw, 1/4 turn and
pull straight out. Repeat for second limiter
cap.
Complete carburetor readjustment.
RPM settings for saws.
NOTE:
Saw tuned without chain installed.
Idle Speed = 3,000 ± 200 rpm
Full Throttle = 11,500 ± 500 rpm
23.3
Using a 5/64" straight blade screwdriver,
gently turn the adjustment screws clockwise
until completely closed.
23.4
Set the adjustment screws at the basic
setting (see section 23.1).
The side cover must be held tightly
in place with the side cover nuts, using a
bar and no chain.
Failure to follow this
procedure may result in personal injury
and or
damage to the saw.
23. CARBURETOR TUNING
A
B, C, D
