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Copyright © 2005 ICS, Blount Inc.
633GC SHOP MANUAL
23.1 Complete carburetor readjustment.
23.2 Look into adjustment screw hole.
A Observe orientation of the release
slots on the adjustment screw limiter
cap.
23.3 Insert the limiter cap puller blades
into the release slots.
A Firmly hold the tool shaft while
screwing in the puller screw until
the screw head is against the puller
shaft.
B Unscrew the puller screw.
23.4 Using a 5/64” straight blade
screwdriver, gently turn the
adjustment screws clockwise until
completely closed.
23.5 Set the adjustment screws at the
Basic Setting:
H = 1 turn counterclockwise from
closed
L = 1 1/2 turns counterclockwise from
closed
23. CARBURETOR TUNING
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