Breaking in an Engine?

WingingIt74 Mon Feb 04, 2013 9:55 am

What's the proper way to break in an engine? How many runs usually before it starts showing it's max power?

**Cribbs74** Mon Feb 04, 2013 10:32 am

WingingIt74 wrote:What's the proper way to break in an engine? How many runs usually before it starts showing it's max power?

Not sure if there is a "proper" way. I have seen quite a few variations on the break in. Cox suggested minimal break in (whatever that is) I am sure the answers you receive will be varied. I would think after several runs the numbers should be somewhat constant. That's my experience anyway.

Surfer_kris Mon Feb 04, 2013 11:31 am

The best way is to do the running-in on a bench, then you can easily adjust everything while the engine is running and get a feel for how it runs. Run rich for the first few tanks on a small prop and then begin to lean it out and watch how the engine reacts. If the rpm increases at first and then begins to drop, the engine is overheating and needs more of the rich running.