What should compression be?

[rcmely]

I'm trying to determine if I should bother restoring a Clinton Chainsaw. In general, what should the compression be in lbs to insure the saw will run at all? And, would this be the same for most chainsaws?

 

[fishhuntcutwood]

Tell you what, try a quick search for "compression" here on AS. This gets discussed alot. This will give you all kinds of good reading

Welcome to AS.

Jeff

 

[troutfisher]

check out this thread...
http://www.arboristsite.com/showthread.php?t=36879&highlight=compression+psi

 

[daemon2525]

EVEN on VERY OLD SAWS?

I was just wondering if the compression numbers that have been listed so much actually apply to a VERY old saw. I am assuming that his CLINTON is old.

Like a 1950 or something.

 

[oldsaw]

I was just wondering if the compression numbers that have been listed so much actually apply to a VERY old saw. I am assuming that his CLINTON is old.

Like a 1950 or something.

Yes, since the laws of physics don't change. If you just want it to run, 120-130 may work. If you want to use it, 140+. You get much lower than 120, it probably isn't even going to start.

My old early 60s Mono/Wards has enough compression to let you know its there. It bit back once...80ccs, its a serious saw, and still is.

Mark

 

[troutfisher]

Yes, since the laws of physics don't change. If you just want it to run, 120-130 may work. If you want to use it, 140+. You get much lower than 120, it probably isn't even going to start.

My old early 60s Mono/Wards has enough compression to let you know its there. It bit back once...80ccs, its a serious saw, and still is.

Mark

right.... I have an old Reed-Prentice with low compression, so low it won't run. If I pour oil in the spark plug hole, It'll sqeeze good for a couple pulls and sometimes pop. Then the compression drops right back off. I need rings. Got any?