Club Homepage Forums Classified Ads Buy & Sell - Everything But Airplanes SMOH Numbers....

Just curious. As I search thru classifieds, I happen to notice odd numbers on engines with conflicting numbers SMOH. I'll change the numbers slightly from what was posted, but, here's one I came across....



Confusing here...If the engine has 310 SMOH, why would it have 225 since the TOP. To me, not proclaiming to be an engine guru but fully understanding the mechanicals of it, it seems like that issue would've been addressed at the time of overhaul while the cylinders were off?

Maybe some of the members can enlighten me on why this would've been overlooked?

Thanx in advance,
Bengie Phillips
Columbus, GA
(ps, the sample signs are on their way to Lori...sshhhh!)

Maybe he leaned too much and scorched them?

If they only flew the plane say 10-20 hrs a year it could be about 5 years or more from the major to the top. Just a possiblity.

Could be a typo. Could be years of inactivity.

Also, some folks overhaul the cylinders during a major
rather than replace them.

All valid points, but it's also possible the jugs weren't broken in right, and had to be redone. Lots of guys think you have to baby a fresh engine. Not so! You've got to run it hard enough for the rings to seat properly!

I dunno, I've seen it in several classifieds and not just the Cessna 150/152 type. It just seems mighty strange to pull it all apart again and rehone, reassemble.




I can agree with that, too. Personally, I'd rather have the new cylinders at overhaul, along with a nice set of roller rockers.... oops, they aren't approved.

Bengie Phillips

You would have to look at what year they overhauled it also. In the 80's and early 90's they didn't have the cylinders like they do now. So most would rehone and rework their cylinders. Now it is better to get the assemblied cylinders.