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Old March 9th 04, 07:39 PM
Orval Fairbairn
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In article ,
(Gene Z. Ragan) wrote:

Hi,

I am in the process of restoring a Pazmany PL-1. It has an O-290-D
with about 1800 hours on it.
The original logs go back to 1951 and the engine has never been
overhauled. At some point in the
60s some top end work was done but the exact nature is not listed.
The engine technically has 200 hours left before TBO but one cylinder
is at 60 compression and the thought of flying it as is scares me.

Parts seems to be scarce for this engine, but they can be found. I
could embark on an adventure and get guidance from an A&P and attempt
a rebuild. I could find someone to do a rebuild or I could sell
the runout engine and put a O-320 in, which seems to have a stable
parts supply.

Could I get some advice from the group?

Thanks!

Gene


I would overhaul it, pronto! It is very likely that the cam and tappets
are worn, due to the hihg mounting of Lycoming cams.

El Reno Aviation has plenty of parts available -- the tappets and
lifters are tha same as O-540/O-360, etc.

Cylinders, pistons, rods are the same as O-435, of which Lycoming built
thousands for WW-II Stinson L-5s.

You can get another 10 hp by converting to an O-290 D2, which entails
using 7.5:1 instead of 6.5:1 compression ratio pistons.