Blount ICS 613GC User Manual

Page 71

F/N 71537 Oct 07

TITLE

613GC SERVICE MANUAL

23. CARBURETOR TUNING

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:

H = 1 3/4 turns from closed
L = 1 1/4 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.

23.5 Start the saw and warm up the

engine.

23.6 With a tachometer check the saw

rpm, with no bar and chain:

A Idle = 3,000 ± 300 rpm
B If the idle rpm does not fall into this

rang, adjust the T screw, clockwise to
raise RPM, counterclockwise to lower
RPM.

23.7 With a tachometer check the saw full

throttle rpm, with no bar and chain:

A Target = 11,000 ± 500 rpm

23.8 If the full throttle rpm falls below this

range, turn the H screw in (clockwise)
1/16

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.