Head Milling Questions?

[Banchetta]

Nice job Ben, couldn't have said it any better. I'd rebuild it asap. Its called preventative maintenance.....Cost a little now or a lot later...

[fast87]

i knew most of that, but you organized it and added more info. thanks, as for the elevation, i'm at about 400' at most above sea level, the guage i was using is a nice 1, so i don't doubt the reading, i also tested my engine hot, for my guage i have to take off the tank and plastic around the tank to use the guage, but it was actually about 8-10psi less when hot...as for the riding it with low compresion, i was wondering where the compresion goes? down towards the crank is my guess, and woulden;t that be a bad thing to have too much pressure down there? Thanks again for all the help ben, later.

 

~Mark~

 

P.S.-i've always ran 32:1 yamalube for a while then switched to quicksilver outboard oil, which is cheaper and i haven;t had any problems so far for the 4 months i've ran it...so there shoulden;t be too much friction as compared to a leaner fuel/oil ratio, right? and what would the right amount to oversize it? 1/2mm?

[boonman]

The compression doesn't go anywhere. the motor just isn't making it. With 95 at 400' above sea level, it is definitely time for a rebuild. And you can spend a few hundred bucks to rebuild it now, or when a skirt cracks off and goes into the lower end and trashes the crank you will be very mad at that price tag. Or, you could have a ring let go and do the same thing. it is the lay of the land with a shee. you have to pay the piper sometimes. Not rebuilding a two stroke is like not changing the oil in your car. Sooner or later, something wil happen....