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About Michael
Expertise
Ex-Tool & Die Maker. For the last 30 years I have performed maintenance on a large estate, including mechanical repairs of cars, trucks, tractors, ATV's, carts & trailers, chainsaws, mowers, snowblowers, machinery, hand tools. I do blade & tool sharpening, modifications and adaptations requiring designing and fabrication of accessories or parts made of metal, wood or plastic. Indoor skills include repair of appliances, furniture, electrical wiring, plumbing and structure.

 
   

You are here:  Experts > Home/Garden > Home Appliances > Small Engines (Lawn Mowers, etc.) > carb rebuild kit, stihl chain saw, model 041, farm boss

Small Engines (Lawn Mowers, etc.) - carb rebuild kit, stihl chain saw, model 041, farm boss


Expert: Michael - 12/12/2005

Question
my schainsaw would only run/cut for about 10 minutes and then stop; after it cooled, about 30-40 minutes it would run for another few minutes before stopping. i bought a carb kit and replaced gaskets, diaphram etc and now it runs even rougher-i can hardly get it started before it cuts out. the hi and lo needles were not touched; i  checked and both are still set at 1-1/4 turn as before. i think i replaced everything in the carb as i removed it. any suggestions

Answer
Hi Richard,

Right after it quits, check for spark, so you can rule out ignition problems.  The low speed needle is usually set at 3/4 turn out.  Check for a good fuel flow at the carb inlet.  Check the muffler and exhaust ports for carbon clogging.  Check for air leaks at the crank seals.

Let me know how you make out.
Michael

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