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Tool Talk Discussion Forum

Chainsaw starts but quits

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R

05-29-2004 14:10:32




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I recently bought a chainsaw at a garage sale. It is a light duty, 2.0 cubic inch, craftsman. When I try to start it up, about every tenth time, it will run for about a second and die. I have never had it running for more than 2 seconds. It had some old gas in it. I took most of it out, cleaned the air filter, cleaned the spark plug, and made sure the wires were tight. The gas line had what looked like a kink in it. I cut it out and put it back in. Have not tried it since then.

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bob

05-31-2004 20:49:11




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 Re: Chainsaw starts but quits in reply to R, 05-29-2004 14:10:32  
take the muffler off & check piston & rings for scoring marks. If you see them, chuck the saw.



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JP

05-30-2004 08:35:21




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 Re: Chainsaw starts but quits in reply to R, 05-29-2004 14:10:32  
The best way to solve this problem is to just give it a good thorough tune up. First test for spark, being it will try to run, should have spark, Check compression, a 2 cycle engine needs a minimum of 90# of compression to start and run correctly with power, they will run on lower compression, but will be hard to start, and not run at their full potential.
New spark plug, new fuel lines, new fuel filter,clean the air filter with soap and water, not gas, call me careless, clean and rebuild the carb. a plugged up exhaust port will not let it run at all, a plugged muffler screen will usually run, but real sluggish.That should get ya going, good luck

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Bob

05-30-2004 06:00:06




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 Re: Chainsaw starts but quits in reply to R, 05-29-2004 14:10:32  
R, check the exhaust to see if it has a screen in it. If it does these sometimes carbon over and the result will be what you are experiencing. Good luck...



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roy

05-29-2004 22:18:56




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 Re: Chainsaw starts but quits in reply to R, 05-29-2004 14:10:32  
I have a poulan pro 210 saw. Two years ago I started having similar problems. Eventually it would not start at all. I was convinced it was a carburetor problem and had it apart several times, before I finally checked and found that I had no spark. It was the electronic ignition that had gone bad. I had a shop verify that and replaced the module for about $55. It has run fine since.



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Charles (in GA)

05-29-2004 17:24:44




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 Re: Chainsaw starts but quits in reply to R, 05-29-2004 14:10:32  
From what others have said, the Craftsmen chain saws are made by Poulan. They use tiny yellow Tygon tubing for fuel line, one runs from the crankcase to the carb to provide pulses to operate the "fuel pump" and one runs from the pickup filter in the tank, thru the wall of the fuel tank, to the carb, this is the fuel supply to the pump/carb. there is a third line that runs from the wall of the fuel tank to the area where the carb is located. It has a rubber vent valve inside the tank that pushes up into the tube and then the tube is forced up into the hole in the wall of the tank. The other end of the hose has a tiny bronze air filter. All of this vents the fuel tank.

I just replaced these hoses on my Poulan after about 12 years of use. The tubing gets hard and brittle. On mine the pulse line from the crankcase was cracked. Its kinda tricky to route the tubes thru the tank wall and get the vent hose sealed correctly in its hole, but if you are careful it can be done. You have to remove the carb and the shrouds.

If this doesn't cure the problems, the fuel may have gummed up in the carb and the carb may need overhaul, kits are readily found for the Walbro carbs on the internet.

If you use a synthetic 2 stroke oil such as Amsoil (I sell it and many of my friends have been sold on it just by using it) you will experience easy starting and the fuel will never go bad. You can let it sit all winter in the saw and gas can and it will work next spring like you just mixed it up!

Charles

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Carb. Cleaner..John,PA

05-29-2004 15:35:17




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 Re: Chainsaw starts but quits in reply to R, 05-29-2004 14:10:32  
You might consider spraying some carburetor cleaner thru the carb. Probably has a build-up of oil from the gas mixture. I always make sure that I run the engine until all the fuel is used up. Seems to help from the carb. gitt'n clogged with the oil in the fuel mixture. Hope this helps.



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MAC,IL

05-29-2004 15:46:21




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 Re: Re: Chainsaw starts but quits in reply to Carb. Cleaner..John,PA, 05-29-2004 15:35:17  
The things I would do, clean the carb, be sure the gas filter is not pluged from old fuel, check the fuel lines as they may be deteriated and then the muffler screen if applicable.



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