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Post by mcycle12 on Feb 25, 2016 17:09:46 GMT -5
Thanks for the replies! I'm going to be in Portland ME this weekend, but will be back at it the following weekend. Now that I have my compression tester back that will be the first thing I check out.
Herbertv2: Reading your info about replacing the carb is what led me to do the same thing. I was fortunate to get one at a decent price. Some I see on ebay are quite expensive.
sawnami: Is the tilting test go see if the line/filter position in the fuel tank is the cause? I do have one of the newer filters on it that is smaller and lighter than the standard one. There was no line or filter on the saw when I first got it.
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Post by sawnami on Feb 26, 2016 1:07:46 GMT -5
Tilting it on each side will help to check if the crank seals are doing their job.
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Post by mcycle12 on Mar 21, 2016 15:14:40 GMT -5
I had a chance to look at the 925 yesterday to see what the problem may be. Sixty PSI on a compression test and a scored piston/ring is what I found. Not sure what to do with the saw at this point. Are there any NOS cylinder and pistons out there still?
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Post by undee70ss on Mar 21, 2016 20:27:08 GMT -5
I had a chance to look at the 925 yesterday to see what the problem may be. Sixty PSI on a compression test and a scored piston/ring is what I found. Not sure what to do with the saw at this point. Are there any NOS cylinder and pistons out there still? 60 psi is way to low for the saw to run well. XL925's came in two different displacements, 77 and 82 cc. ( 2in or 2 1/16 diameter piston I believe ) You would need to take the saw apart and determine if you need just a piston and rings or piston and rings and a cylinder. If just a piston be sure to get correct diameter. If P&C be sure diameters match. (Especially if buying from two different sources) New stuff shows up on the bay from time to time.
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Post by Clasec on Mar 21, 2016 23:17:15 GMT -5
I had a chance to look at the 925 yesterday to see what the problem may be. Sixty PSI on a compression test and a scored piston/ring is what I found. Not sure what to do with the saw at this point. Are there any NOS cylinder and pistons out there still? Lil' Red Barn sells replacement piston kit for the 925, $39.95. It's the 2 1/16 dia.
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Post by sweepleader on Mar 22, 2016 7:44:53 GMT -5
Well, I have been reading this thread with interest as I just bought an SXL925 a little while back. I finally got it into some wood over the weekend and it runs so rich the high speed jet can be closed without leaning the mix enough to notice. Guess that might indicate a problem. lesorubcheek offered, "Assume you have an HS 151 Tillotson carb. Think most 925s had these. There's a governor for high speed that prevents it leaning out, but I'm guessing if it was bad, you'd see a very rich condition at full throttle, and it's probably be constant, not after running OK for a short time. Still, something to think about. It's the brass plug with a slot for removal. If they go bad, you can use a small piece of brass, copper, aluminum, etc to plug the opening inside. Again, I wouldn't recommend starting there, but if the other suggestions don't pan out, its a possibility." Read more: houseofhomelite.proboards.com/thread/5035/925-tries-load-solved-sorta#ixzz43dQnIvT5 I will check that when I get a kit. Dan, did you mean just plug the hole solidly, no governor action at all? Thanks, other Dan
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Post by lesorubcheek on Mar 24, 2016 20:44:54 GMT -5
Yes, that's it. Several years back on AS there were recommendations for doing this. I've made a plug by using a leather punch on an aluminum pie plate when I've tested a few governors, even though never found any that were the actual problem before. Others have said though that they've had these fail and over-rich at too low RPM.
Dan
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Post by sweepleader on Mar 25, 2016 6:25:32 GMT -5
Thanks for the confirmation Dan, I will look into that if the kit does not take care of the problem.
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