The rule of thumb is that the prop should be installed so that the impulse coupling on the magneto clicks when the prop is pulled counter clockwise from what I can describe as the 10 o'clock position to the 7 o'clock position.
We're still installing props in a position where the engine can be started by manually "propping" the engine.
FWIW your Lycoming engine will be hard to get as smooth as a Continental six cylinder engine. Just the facts.
0.04 IPS is good.
It's possible that you're feeling vibration that's being "transmitted" through contact between the engine and the cowling. The vibration isolators (engine mounts) are designed to isolate the engine from airframe, but one place I would look at is cowling and baffle seals with the cowling. You're looking for evidence to wear or contact.
Let me know what you find,
Congrats on your Comanche. IMHO, it's the best XC airplane for the dollar.
I own a 1960 180.
You can buy what's called the Killough manual from Webco. (
It's a modern equivalent to the original owners manual. Much more expansive and chocked full of useful information.
All Comanche owners need to get acquainted with Webco.
How did you happen to decide to get a Comanche??
Hey Comanche owners! I’m a new Comanche owner using my plane to commute 400 miles weekly in North Arkansas and for family trips. Loving it!!
Mine is a ‘62 with the factory fuel injected option and the documentation that came with my bird is sparse.
Does anyone know of a source for an original or updated Operating handbook with numbers for the injected 250?