Lycoming break-in advise

[dblj006]

I have had different break in advise and was hoping for some more to back up what I already have...

What I have is a straight vlv. 0-320 (same as a1a) new pistons, rings
and rebuilt cylinders(airworthy).

Please point me in the right direction here...

Thanks

 

[deepsea diver]

http://www.tcmlink.com/visitors/carenfeed/brkin.pdf

This was in another thread.

 

[dblj006]

Thanks but this engine hasn't been run in on a test stand.
I'm of the thought that what applies for an engine in an airframe is going to be different than on an airboat. I can't do a certain rate of climb @ a % of throttle.

I appreciate the link though.

 

[deepsea diver]

Email captjeff, he just broke in a 0540 from daves airparts.

Its the same basically, you just got to expand the rings to wear the cly walls. Take it on a nice cruise and every so often load it up for a short time.
Watcht the temp, when it comes up back off.

 

[jim]

This is what lycoming says. I would do the initial low power runs in the water and the high power runs (75% is about 2500 rpm if it is propped to turn 2750 max)) somewhere with enough drag on the boat that it will not get going to fast for you. They want the high power runs to seat the rings. The rings are seated when the oil consumption stabilizes.



http://www.lycoming.textron.com/sup...ePublications/serviceInstructions/SI1427B.pdf

jim