I got dirko coming at napa tomorrow. But dealer says that ring gap is far too big. Those are caber rings so idk why they're so gapped. Got some oem rings on order from the dealer. Fingers crossed
That was something I was thinking, but your squish is good so I don't think that's the case.Also I have a new crank in here. It looked the same as the old one but I never measured. Could we be talking about a stroke issue?
Is there a way to improve that or is it just new rings?That was something I was thinking, but your squish is good so I don't think that's the case.
Your end gap of .032 is huge, we might have found the culprit. I don't have an 064 myself, but with a 52mm bore I think you'd want less than .01, a bit tighter would be better.
Still looking at compression in the 95 range. So that checks. I just put my compression tester on my ms 170 and it pulled 125. It runs great so I'm wondering if my tester is testing lowIs there a way to improve that or is it just new rings?
I honed out and cleaned the oem cylinder and slapped it back on. It runs!!! Can't tune it to run right though. And if I put too much pressure on the chain in the cut it stops the chain and bogs the saw to death still. Seems low compression still but it runs with a filter so we're getting somewhere.
Tested it with a compression tester i know works. Same result. So thats its true compression. THE MYSTERY CONTINUESStill looking at compression in the 95 range. So that checks. I just put my compression tester on my ms 170 and it pulled 125. It runs great so I'm wondering if my tester is testing low
Ok that could make sense. But do you know why I would have these problems with the new meteor jug too?Wore cylinder, out of round more than likely with probably some taper
Just because it's new don't mean anything. I rebuilt a 288xp using a new OEM mahle piston and cylinder set and It would only give me 120 psi. After some heated arguments with tech support, they traded me out, and the replacement had 150 psi.Ok that could make sense. But do you know why I would have these problems with the new meteor jug too?
Is the 95 PSI with the OEM cylinder and Meteor Piston/rings?Still looking at compression in the 95 range. So that checks. I just put my compression tester on my ms 170 and it pulled 125. It runs great so I'm wondering if my tester is testing low
That's the most promising story I've heard in weeks about this.Just because it's new don't mean anything. I rebuilt a 288xp using a new OEM mahle piston and cylinder set and It would only give me 120 psi. After some heated arguments with tech support, they traded me out, and the replacement had 150 psi.
Yes! But I just ran it in some wood lightly for about 30 minutes off and on and I got 105 now after letting it cool.Is the 95 PSI with the OEM cylinder and Meteor Piston/rings?
I got dirko coming at napa tomorrow. But dealer says that ring gap is far too big. Those are caber rings so idk why they're so gapped. Got some oem rings on order from the dealer. Fingers crossed
Meteor cylinder kit may have huge squish
Meteor pistons are fine to use there next too oem to use
Aftermarket cylinder kits are all over the map on tolerances
We get about 200 lbs with squish band s cut and bases cut ending about 22 squish on 064 with dirko base sealant
If still have a problem think about sending it out too get some port work done and some machining
064 s run great
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Its funny I had the same two ideas. I'm gonna do both. I have new rings coming from the dealer (who knows when the heck those will come in) and I'm talking to my machinist buddy about decking .020" of the cylinder. From what I've read, it won't put the ports too low and no additional machining needs to be done.I figured as much, I'm pretty much positive it's the rings. For ***** and giggles you could try transferring the rings off the old piston if they fit the new piston, but that would just be part of the testing to confirm the new rings are the problem. I think that step is unnecessary at this point, you're going to want some new rings regardless, but it can give you something to do while they ship lol.
I'd check your squish before you go cutting the base, that way you can do a more accurate job when you're doing the actual machine work.Its funny I had the same two ideas. I'm gonna do both. I have new rings coming from the dealer (who knows when the heck those will come in) and I'm talking to my machinist buddy about decking .020" of the cylinder. From what I've read, it won't put the ports too low and no additional machining needs to be done.
I did. Squish was .0425 with the .5mm gasket. I'm taking 20thou off. If it somehow doesn't work cause I measured wrong, I can put the 1mm which would add almost 20thou back onto itI'd check your squish before you go cutting the base, that way you can do a more accurate job when you're doing the actual machine work.
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