What Kind of Deal is This

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chuckiehow

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Have shared my dilemma with the 025 on other threads, received advice and made corrections, yet it still persists to balk. Here's the changes:

Three new sparkplugs in the last two weeks
Put on good carburetor that worked well on another saw
Checked fuel line...okay - no cracks.
New fuel and air filters.
Tightened bolts on bottom of jug

Had to prime with gas to start the saw today. Ran perfect for 3 or 4 minutes and then died and wouldn't fire again. Acted as if there was no spark but a little gas prime in the carb and/or plughole caused it to start. Went through that process a half dozen times before I'd had enough rope pulling. Sometimes it would sputter roughly and then immediately fire and run perfectly for its alloted 3 or 4 minutes. I'm having a hard time finding a low idle and the compression also is not top end. That tells me that it needs rings (the piston looks real good) and also might be sucking air; making a lean mixture that causes it to idle fast.

When I pulled the fuel line off the carb tonite, gas spurted which tells me that the suction system is working well. I removed and checked the impulse line anyhow...looks good. Shall I suspect the coil or the compression? I think I'll look at the crankseals while I'm into it this far. Thanks.
 
I would check compression first because that is easy to do. But it does sound like crank seal given you have eliminated everything else.
 
I would check compression first because that is easy to do. But it does sound like crank seal given you have eliminated everything else.

Shut up Napolean!!!!

Sorry, couldn't help myself, that avatar killed me!!!

Check the compression!!!
 
Last edited:
Well I pulled things apart last night and the crank seals look fine. Waiting for a jug (complete) I got off E-bay and providing it is what was represented, I'm just going to put that one in the saw and rebuild the old one. Yep, it looks as compression is the problem. Thanks guys.
 
You did check the tank vent, didn't you?

No I didn't, but ya know what?...........That thought did come to me after I saw so much pressure in that fuel line. Although, if I can admit it after the fact, that saw tried to kiss the ground yesterday while I had the pullrope handle in my hand at shoulder height. Not Good !!
 

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