(1) Clean all build up of oil or debris from all parts of carburetor.
DO NOT breathe cleaning solvent vapors for long periods of time or use solvent
near open flames. To avoid illness, explosion, or fire, only use solvent in well
ventilated areas away from open flames.
Be sure to remove all cleaning solvent from all carburetor parts after cleaning.
Any foreign material left in or on carburetor parts can severely impair operation of
(2) Clean all metal parts with a clean soft cloth (item 3, Appendix E) or medium bristle brush (item 4, Appendix E)
(3) Allow all parts to dry.
(1) Inspect the point of both the idle needle valve screw and the high speed needle valve screw to see if either
screw has a bent or grooved point. Both screw points must have smooth tapers. If either screw point is bent
or grooved, replace the screw.
(2) Place a straight edge across mating surfaces of upper and lower carburetor assemblies. If surface is not flat
or has evidence of warpage, replace part.
(3) Check all parts for cracks or chips on surface. Replace any part which is cracked or chipped.