compression on 841

Bob in Tennessee · Mar 10, 2015

I have a field found 841 with loader. No
telling how many years it sat in the weather
but i brought it home, took off loader, and got
it in garage. Not wanting to try to crank it
dry I squirted oil in the cylinders, turned
crank by hand a few times and then let starter
turn it over. These are my results. 135-170-
170-160 wet. I would like to have a dry reading
but a felt better oiling it because of its
condition. Question is with such a big
difference between #1 and everybody else,
should I bite the bullet and rebuild, or will
it start this way and give me one season of
work before a rebuild next winter?
Thanks

jobob · Mar 10, 2015

Usually ya don't want more than 10% difference between hi and low. I this case I think numbers are close enough. I'd give er a try as is.

old · Mar 10, 2015

All those numbers are good if not super good other then the 135. If it was me I would pour in some ATF in the low one and let it sit a day or 2 then fire the puppy up and use it. Good chance the rings are sticking some on that cylinder but not real badly

souNdguy · Mar 10, 2015

Ditto, hit oil, and gas with some atf, lube the cyls for a day with atf and turn over by hand every few hours, just a bit to move it some, then run the oil out the next day with starter, fire her up and go now with her for an hour, then dogma another dry and then wet test.

David G · Mar 10, 2015

Make sure and blow the ATF out before cranking it, do not want hydro lock.

Bob in Tennessee · Mar 11, 2015

Thanks guys! I fiddled with her last night to ck for spark and got 145 psi out of no.1 which was 135 night before last. I'll put in some ATF tonight and let sit. Meanwhile i'll get a carb kit and tune up kit and get er goin'!

compression on 841

Bob in Tennessee

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jobob

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old

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souNdguy

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David G

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Bob in Tennessee

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