Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: kefflon on October 03, 2014, 05:23:17 am
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I changed the spark plug and saw the tip was dirty and oily. It didnt want to start with the new one. I also saw the decompression valve was dirty and oily, and the cooler arond it. What can be wrong?
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Is that decomp stuck in?
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Or loose?
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Put a $2-$3 decomp plug in it to rule the decomp out. http://www.hlsproparts.com/Decompression-plug-for-chainsaw-cut-off-saw-p/t635701.htm
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+1 Kevin, use a plug, nix the decomp!
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The decomp moves in and out, but its just a little bit loose. Can it cause the start problem. And if i replace it with a plug, how do i take the decomp out? do i pull it or screw it?
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i got it loose now, when button is in i can blow through it, when its out its closed. So its better to replace with a plug?
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Was the decompression valve loose? The first picture looks as though there was a bunch of carbon and oil at the base of the plug? Is the gasket on the decompression valve? If the decompression stuck open or leaking the saw could run port or not at all. Try putting the decompression valve back in and make sure it's closed (button OUT) then see if you can start it.
Has this saw run in the past? What's It's history?
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The saw was running nicely til couple of days ago. I did as Cut4fun said and replaced the decomp with a plug. Not a proper one though, just a normal bolt that fitted. (see picture) Now the saw ignited, it sounded like it was going to start. But it never started idling properly. Any tips?
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A few basics to check: the screen on the muffler may be clogged if it has one, check the fuel lines/filter as they may be old **** during the last use Make sure the plug wire and ground wire aren't compromised and grounding somewhere. Check carb screws and cylinder bolts. Pull the plug out and check for spark.
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Thanks! Will go through those things.
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Do a compression check. Fought several w/ same issue of not wanting to start.
Shep
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Like Adam mentioned I have found when there is a lot of gunk and oil then there is a good chance the spark arrestor screen is plugged up also.
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Is the spark arrestor inside the muffler?
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and by the way, I found a proper decomp plug now
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Looks like it doesn't have a screen in the muffler outlet??
We're you able to check for spark with the plug out? Make sure the plug is touching the cylinder for a ground source
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Granted the saw has spark, i'd check the carb needle setting to see if they're in the ball Park and try starting it. If it doesn't start pull the spark plug and see of its wet with fuel.
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Thanks, Ill check for a spark with the plug out.
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If it's got a good spark I'd start looking at the carb for possible flooding issues.
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Is the spark arrestor inside the muffler?
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Looks like it doesn't have a screen in the muffler outlet??
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That looks like one of the mufflers that doesn't have a spark screen to me - like an European one....
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That's interesting. Guess you legally only have to use one on jobs like USFS, etc. We done a fair amount of government work tree/clearing jobs and that's never come up. Shovels/ fire extinguishers, water supply is usually required.