Question about Husqvarna Chain Saw 20" Bar

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Chainsaw is extremely hard to start and won't stay running.

Replaced all fuel line, fuel and air filters, and primer bulb. The saw is difficult to start and won't stay running. When it sounds like it's about to die, I will apply gas and that seems to kill it faster. Also noticed that when I prime the saw the fuel just leaks out of the carb, never happened before.

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  • eric1958 Dec 31, 2008

    Did that!

  • tplp5100 Mar 22, 2009

    I start the chainsaw , runs for 5 sec or less than dies. I try to give it gas as it is dying but it sounds like it is starving for gas. I restart it every time right after. It's a new chainsaw about maybe 2 hr's on it. Its 2 yr's old. It's a stihl ms290. I was running the saw for about 10 min's then this happened. Thanks for any help. Tom

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It turns out to be a crack in fuel line. It didn't leak but would **** air.

Posted on Mar 23, 2009

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Adjust the two little screws on the carburator

Posted on Dec 31, 2008

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1 Answer

After running for a bit it wont start, the primer is < a 1/4 full just sucking air.


this sort of sounds too me as A fuel line routing problem / as sometimes happens when replacing a old fuel line one doesn't get it back right as it was before and maybe runs line instead by a part that gets hotter than others , this causes fuel to boil in a hot saw and create a air pocket , this makes it near impossible to get liquid fuel to pass by it and blocks up the works , other thing it could be is that primer bulb has a tiny crack inside and allows air to enter and not fuel (heavier) ive seen that happen a few times as well

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http://www.youtube.com/watch?v=JrXpU70Hmi0
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