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Poulan chain saw trouble

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Rod MI

11-24-2001 10:52:26




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My chain saw will not idle with out fowling the spark plug I adjusted the carb and tried different oil I mixed it at 40 : 1 like the manufacture recommends and still fowls the plug and I went to 50 : 1 mix and now it seams to run well at wide open but still fouls plug if it idles for a short time and if I let it idle then give it gas it will bog and die on me what could be the problem and I am using a hotter spark plug this has been running like this sins new and I think the warranty is of now any suggestions would be grate Rod MI

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Robert Webster

07-14-2004 12:31:47




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 Re: Poulan chain saw trouble in reply to Rod MI, 11-24-2001 10:52:26  
I need a part for my old 245A saw (part#530011107 chain side cover) if anyone can help! Thanks RRW



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Rod MI

11-26-2001 22:51:08




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 Re: Poulan chain saw trouble in reply to Rod MI, 11-24-2001 10:52:26  
it looks like it whose the carb adjustment screw whose to far out will now this weekend for shire but I must of ran about a 1/4 tank of gas threw it at idle and seams to be all right thanks every one and will let you now this weekend how thinks work out Rod MI



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Don

11-26-2001 11:18:50




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 Re: Poulan chain saw trouble in reply to Rod MI, 11-24-2001 10:52:26  
It wouldn't hurt to check the exhaust. Sometimes the muffler will carbon up. It can be dissambled and cleaned.



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Kevin

11-24-2001 12:17:58




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 Re: Poulan chain saw trouble in reply to Rod MI, 11-24-2001 10:52:26  
Does the choke plate open up as it should?
Also, my dad had a lawnmower (2-cycle) that always had problems like this. Turned out the carb gasket was improperly installed at the factory.



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Rod MI

11-25-2001 19:42:39




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 Re: Re: Poulan chain saw trouble in reply to Kevin, 11-24-2001 12:17:58  
Kevin the choke seams ok and the carb gasket mite have sum thing to do with it (will look into it ) but looking at it tonight I think they did not put the low adjustment screw in far enough sow I removed to adjuster screw stops and will sea tomorrow if that will help do you now how far should the carb screws be turned out for 4 cycles 1-1/2 turns is a good start but what about 2 cycles and thanks for the post Rod MI

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John in MA

11-25-2001 20:13:15




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 Re: Re: Re: Poulan chain saw trouble in reply to Rod MI, 11-25-2001 19:42:39  
The screw stops usually are useless for me.

As far as how to adjust the carb, there's no preset. Turn the idle mix screw in about 1.5 turns and get it running at idle. Once it's running, you want to adjust it so the saw runs the fastest. Then adjust the idle speed screw so the chain doesn't move. That's it for the idle.

John



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Russ

11-26-2001 22:49:19




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 Re: Re: Re: Re: Poulan chain saw trouble in reply to John in MA, 11-25-2001 20:13:15  
John, you meant turn the idle mix screw OUT didn`t you? Good way to adjust low speed needle on a saw is to back out the idle speed screw until it has no effect on engine speed and then you can accurately adjust the idle mixture screw. I think the thumb rule per the manual for Husky and Stihl is to lightly seat the low mix screw and then back it out one turn, start the saw and slowly, giving the engine enough time to respond, turn the screw in until you reach highest idle speed. Make note of the screw slot position, this is the leanest setting the saw will run at. Now slowly turn the screw out until the engine blubbers and starts to die, make note of this position, this is the richest setting. Now turn the screw to the midpoint between your two noted points. This should be the correct idle mixture setting. Goose the saw a couple times to check acceleration with minimal hesitation. Now turn the idle speed screw in until the engine speed picks up to where the chain starts to jump and then back it off to where the chain is static. Another quick and dirty way to do it is turn the idle mix screw in until you get max rpms and then back out 1/8 turn, set idle speed screw. You`ll find this works 99% of the time. Adjust idle mixture before you attempt to adjust the high speed mix, and then recheck idle mix after you adjusted the high speed mix. Remember that two strokes run at max rpm, no load, when the mixture is too lean. Running lean means hard starting, less than max power, and a risk of overheating and lean sieze.

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mark everitt

05-23-2004 10:44:12




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 Re: Re: Re: Re: Re: Poulan chain saw trouble in reply to Russ, 11-26-2001 22:49:19  
i bought a microxxv at an auction and it is doing the job. irealise it is a disposable saw but it needs to last about 5 or 6 more hours. it will not idle and now it want's to die at max throttle after about 10 seconds into a cut. i spent about 30 years as a high climber using sthil 020 and 020t, ocasional huskys, and poulan 25s along with much larger versions of the chainsaw family up to the sthil 090. can i use the previous information to squeese out this project with my toy saw? thanks for any help.

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