my mac 3200 mcculloch chainsaw will not run but will start in half choke ?

open the (L) low speed fuel mixture adjustment screw
on the carb counter clockwise to give the engine more fuel. turn the mixture screw maybe a quarter turn counter clockwise untill to the point you can open the choke up all the way. then you may have to
adjust your (H) high speed mixture adjustment screw
eather way, from an idle to full throdle to get rid of any hesitation or bog down it may have, when you quickly pull the trigger and give it the gas. you also will have to adjust your idle screw on the carb to maintain the proper rpm. hope this helps. Jimbob

jimbob
March 2011

you need to strip and clean out the carb with a low presure air line. it is not getting petrol thru one of the jets.

Derek
August 2009