Basic Lycoming leaning?

[s10sakota]

OK, I bought a Piper Cherokee to fly while I build my RV. Yes I know it will slow the build progress but I'm ok with that.

It's been 17 years since I've flown behind a Lycoming, but I have a 10 hour flight next week from TX to MI to bring it home. If I remember correctly we used to lean Lycomings by slowly pulling the mixture until it started to run rough, then push it back in about 100 RPM.

Of course there are more precise ways of leaning but there are just basic engine instruments in the ol Cherokee.

I just want to make sure I'm remembering correctly and that this will work as a very basic way of leaning the engine?

Thanks!

[db1yg]

A Cherokee 180 was my first plane--flew that old beast for 5years. Sounds like mine had similar instrumentation--little to none!

I leaned to engine roughness, then enrichened until smooth--worked fine!

Hope this helps.

Cheers,

db

[flyingriki]

Originally Posted by db1yg

A Cherokee 180 was my first plane--flew that old beast for 5years. Sounds like mine had similar instrumentation--little to none!

I leaned to engine roughness, then enrichened until smooth--worked fine!

Hope this helps.

Cheers,

db

After everything I've read on this subject that's still about the best advice there is. Unless you have fuel injection and great instrumentation it will do you just fine.

If you want to get technical:

http://www.avweb.com/news/savvyaviat...g198162-1.html

[mike newall]

Yep - Crack on.....

[turbo]

you will be making some fuel stops. check your gal/hr at fill up to see what rate you are using. this will help verify leaning setting.

[s10sakota]

Thank you!

[woodmanrog]

I lean by watching the tach rise while turning the mixture out and then twisting in one full turn when the ram's start to drop.

[brad walton]

Completely of subject, but Turbo thanks for all the great pictures!

[Ron RV8]

Mike Busch has some excellent leaning webinars on the SAAVY analysis site also on the EAA site.

[xblueh2o]

Originally Posted by woodmanrog

I lean by watching the tach rise while turning the mixture out and then twisting in one full turn when the ram's start to drop.

That is pretty much the way I did it when I had no engine instrumentation beyond oil pressure, temperature and tach.