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I have a "wild thing" Poulan 18" chainsaw which bogs down under a load. I would like to know which of the two star screws is the idle adjustment, and which is the high speed? I have an old craftsman 14" with a manual, and the manual simply and clearly explains how an amateur mechanic can correctly adjust the mixture, first at idle, then at cutting speed. The poulan owners manual only states to take it to a service center. Thanks, Fred

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The larger screw is for idle speed
and should be sett so that clutch does not engage the drum
usually idle is about 2000-2500 rpm and chain should not move

the two needles should be marked L and H

the lo base setting is usually 1- 1/4 turns out from lightly seated

the hi setting is usually the same but done while running @ top no load

sounds like you will have to richen the H setting 1/4 turn anti-clockwise the engine should putter or 4 stroke slightly at rev
caution do not set H too lean or damage may result

if you lean out the low too much the idle speed will increase and coversely if you richen it , it will lower the idle speed

you just need to find the spot where it idles good and accelerates cleanly with no hesitation when you gunn the throttle trigger

again dont set to lean


Posted on Sep 01, 2010

Testimonial: "01Sep2010 Thanks, pauly46. Fred"

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T is throttle (idle speed).
L is the idle and accelleration jet.
H is the high speed jet.

Posted on Aug 31, 2010

Testimonial: "01Sep2010 Thanks, dontbother10. Fred"

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I have a poulan pro 18" 42cc when I gun it it bogs down and stops before this it ran great my first chain saw. Does the carb need adjustment and how do I do that.

Thanks Dave

Posted on Oct 11, 2010

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Is the chain brake engaged? The brake lever should be in the back position. Toward the handle.

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Keep me updated


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