My chainsaw starts but will not run when trigger is pulled

steve

• 181 Answers
• Posted on Jan 09, 2009

SOURCE: 455 Husqvarna chainsaw will not run

pull the muffler off and look for scoring on the piston,the 455 had a problem with running lean from factory and burned up a lot of pistons and cylinders

SOURCE: Craftsman Chainsaw will not start

It's your ignition, which you can take that stuff apart on the left hand side of the saw under the recoil. I have 2 of these, & you can get the parts. Maybe its just the magneto gap adjustment, which is like a business card or newspaper width gap. I would check that first. Hope this helps you, Rick

SOURCE: chainsaw wont stay running

check crankshaft seals,maybe sucking air. most of the time the seal on the starter side. hope this helps.

David Parker

• 333 Answers
• Posted on Aug 10, 2009

SOURCE: Husqvarna 40 Chainsaw won't start

The carb uses the pulses from the crankcase to actuate a diaphram in the carb as the fuel pump.If you strip the carb make sure there are no perforations/cracks etc. on these diaphrams and check too that the valve flaps are OK.if not fit a carb kit.

Also check that the pipe or channel from the carb to crankcase is OK.

If all this is correct you can simply put your hand behind the carb or inlet to check for vacuum if not there you have probably blown a crank seal(but unlikely)and you will have to replace them.

Hope this helps,and please come back if you need any further assistance.

Testimonial: "Thanks again luckyluke I did find it and was able to clean it through I'm still having the problem of not starting though, carb kit next 90lb cyl comp"

SOURCE: Husky 345 chainsaw will only run with choke almost

turn both carb adj. screws out 1 1/2 turns from bottom and then fine tune them with it running. the one marked L is for low speed and the one marked H is for high speed. hope this helps