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Mend McCulloch MAC Adjustment Screws Carb

mcculloch brush cutter/strimmer mac with bull horns?

we have a McCulloch brush cutter/strimmer it has two adjustment screws on the carb. Which one would be petrol and which would be air. I can get it to rev but won't tick over, then i can get it to tick over but wont rev, is their a certain way to set these screws so it will run properly.

Neil Austin
June 2008

McCulloch McCulloch MAC Garden Tools, Grass Trimmers Adjustment Screws Carb

The two adjustment screws are actually both for petrol - one is the low speed adjustment and the other is the high speed running. Turn both screws fully in gently then back out one full turn to get things going.

John
June 2008

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McCulloch MAC Carburetor Adjustment - Help