bucko Posted March 21, 2015 Report Posted March 21, 2015 Just getting my airplane out of annual. Rebuilt one cylinder (#4) that compression tested in the low 50's. The rest of the cylinder compressions were 74 or better. How should I fly for the "Break In" period? How long? Any special oil to use? Plane is a 1965 M20-E with the fuel injected IO-360 engine. Thanks in advance for helpful responses. Bucko Quote
jetdriven Posted March 21, 2015 Report Posted March 21, 2015 Treat it like a new engine for break- in. Your choice, straight mineral oil or Philips X/C 20W50 but run it at 65-75% power for 20-50 hours, until oil consumption stabilizes at a low value and the plugs are dry. 1 Quote
RobertGary1 Posted March 21, 2015 Report Posted March 21, 2015 Don't make it up as you go. http://www.lycoming.com/Portals/0/techpublications/serviceinstructions/SI%201427C%20%2812-29-2010%29/Lycoming%20Reciprocating%20engine%20Break-In%20and%20Oil%20Consumption.pdf -Robert Quote
RocketAviator Posted March 22, 2015 Report Posted March 22, 2015 Treat it like a new engine for break- in. Your choice, straight mineral oil or Philips X/C 20W50 but run it at 65-75% power for 20-50 hours, until oil consumption stabilizes at a low value and the plugs are dry. Funny I had this same conversation with Pinto today. Can tell you Sandman from personal experience Break It In as Byron suggest. I used Mineral oil for 50 hrs the second time I'm my Saratoga Lycoming .... never had a problem the Second time! Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.