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Post by 99tahoe on Jul 28, 2020 18:13:29 GMT -5
hello guys well i am trying to bring another homelite back to life , this time its a xl 925 well i got it all togehter the carb is pulling fuel and there is spark but the only thing is i cant get a full pull on the starter rope with the plug in it , it pulls over fine with plug out and there is no decompression valve on it i did put new rings into it and i have not check the compression pounds yet . i did hear theses saws have alot of compression but i think i should be able to pull it over any info would be great thanks i just tryed to check the compression and i could only get 3 half pulls out of it Attachments:
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Post by edju1958 on Jul 28, 2020 18:53:37 GMT -5
Is it possible you have the wrong plug in it?If the plug is too long it could be hitting the piston preventing it from going TDC.It should have a Champion CJ6 or equivalent.
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Post by 99tahoe on Jul 28, 2020 18:57:36 GMT -5
hello yes there is the right plug i just tryed to check compression and i cant even pull it over enough to get a accurate reading ( only 3 half pulls )
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Post by blythkd on Jul 29, 2020 23:02:57 GMT -5
A 925 in good shape is a handful to crank over very well, that's for sure. Lots of cc's and lot of compression. If you're trying to crank it without the bar on it, that handicaps you even more. A long bar will help stabilize the saw so you can give it a better rip. Or you can put any bar on it and clamp the bar in a solid vise to get a better rip on it.
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Post by tjthechainsawmech on Jul 30, 2020 0:32:31 GMT -5
My rebuilt Mac sp850 with a new piston and rings broke a thick rope with me trying to pull it over. lol Sometimes these rebuilt beasts have Killer compression for sure. I'm betting around 180 to 200 psi the way it pulled...barely. haha
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Post by 99tahoe on Jul 31, 2020 19:57:44 GMT -5
well got her to pull over and she popped a couple of times and ran for a few seconds then died i did rebuild the carb and it holds pressure does anybody have any ideas thanks
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Post by blythkd on Jul 31, 2020 23:17:51 GMT -5
Well if it started and ran a few seconds and died, I'd be looking into fuel delivery. The ignitions system on a 925 has historically been pretty reliable, sounds like yours works.
Did it prime up and start on it's own fuel or did you prime it with some down the throat?
Is the fuel filter good?
Are the fuel lines solid or are they getting soft and mushy?
Sometimes when getting an old saw running, in the event of a quick start and die, a chunk of carbon ends up in the spark plug gap.
If it's none of these items, you might have to doublecheck for correct assembly of the carb components and settings.
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Post by 99tahoe on Aug 6, 2020 5:30:29 GMT -5
I went true the fuel system and I seem to be ok carb is pulling fuel next question is when I check for spark with my tester ( a light that goes between plug boot and plug ) the light lights up like crazy e en with a slow pull but there is either no spark at plug or week spark .... have to get a new plug probably
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Post by 99tahoe on Aug 6, 2020 5:31:21 GMT -5
oh yea its the 925 with the 2 part ignition are then known to have problems ?
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Post by Hoggwood on Aug 6, 2020 12:09:39 GMT -5
It might be worth checking the insulation on leads from the module under the flywheel to the transformer, as well as the generator. They were prone to cracking, particularly around the hold down points under the flywheel. I had erratic spark on a 922 at one point. That was the issue. It didn't manifest until mid RPM. Likely the leads started to vibrate and short at a certain frequency. New leads, problem solved.
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Post by 99tahoe on Aug 6, 2020 14:43:01 GMT -5
there is nothing under the flywheel this has the 2 part ignition its just the flywheel and what looks like a coil
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Post by blythkd on Aug 6, 2020 20:36:16 GMT -5
It's been a while but I think that style ignition on the 925's was ok, sounds like yours is anyway. I think it was just the SEZ and SXL that had the horrible electronic ignitions.
Try that new plug and let us know how it works out.
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Post by 99tahoe on Aug 9, 2020 16:26:34 GMT -5
well i put a new plug into it and it fires and runs a little longer but just dies out i thing it might be the one crank seal i did not replace behind the flywheel i have 1 so i am going to try it the wiring looked ok but i will go thru that again while its apart not sure what else to check thanks
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