Well.... more on our 172 M, purchased in Dec with 2600 SOH...
(we call "On conditio" here in Canada) ...

The bird sailed through it's anual/100 hr inspection requiring
3 cowl mounts...2 we knew about, one other was torn 1/2 way when I
yanked on it...

Borescoped the engine, valves/seats all look good, plugs clean
and burning well, burns 1 litre of oil in 11 hrs...

Compression "way above 70" (mechanics words) at all 12
points...

Engine pulls strong and very smooth, fires/starts in 1/2
rotation...

Came out of a flight school, 2600 hrs since June 2001...

Tach checks show 2350 RPM static when new, still shows 2350
static on the TO run...

We are going to run the sucker till something starts to
show...

Wish us luck!

Dave




On 8 Mar 2004 13:08:14 -0800, (One's Too Many)
wrote:

Paul Folbrecht wrote in message thlink.net...
How common is this? I am seeing some 152s for sale with engines as high
as 3000 hours SMOH. Surprising. (Well, to me!)

O-235's seem to last forever, with an utterly bulletproof bottom end.
Usually last even longer than an O-320, which is basically the same
engine but with larger bore.