Alan Maurer Posted July 18 Report Posted July 18 Hello Mooney People, Just had six factory new cylinders put on Ovation. Carefully read all of Mike Busch' suggestions about how to break in properly. Spoke to Dan Lightner in Carlisle, PA about ceramic coating and flew to Harrisburg from Venice, FL with one fuel stop in Hickory, NC. Ran at 75%+ power running ROP and not overly leaning. ran well and.........10 knots faster than usual. ...no tailwind. but I did watch CHT's and EGT's. Over the flights up to Pennsylvania and back to Florida, CHT's were close to 400 and looking at EGT's , the #4 cylinder was always 50 degrees hotter than the others. I dont know why??? Would be greatful for any ideas!!! Ceramic coating is beautiful! Thanks. ( Mike Busch does not like top overalls, but he did top his Turbo 310) Alan Quote
N201MKTurbo Posted July 18 Report Posted July 18 Fly it for 100 hours before worrying about your temps. 1 Quote
Danb Posted July 18 Report Posted July 18 When I had a new top I flew it hard for a few hours after 5-8 hours my CHTs dropped drastically ie. 30-40* and everything stabilized FF Temps etc now 150 hours alls still good. I believe the proper break in is most important DB Quote
Bolter Posted July 18 Report Posted July 18 3 hours ago, Alan Maurer said: in Carlisle, PA about ceramic coating and flew to Harrisburg from Venice, FL with one fuel stop in Hickory, NC. Ran at 75%+ power running ROP and not overly leaning. ran well and.........10 knots faster than usual. ...no tailwind. but I did watch CHT's and EGT's. Over the flights up to Pennsylvania and back to Florida, CHT's were close to 400 Flying a long cross country encourages higher altitudes (less power) and long periods of constant rpm. I believe there is a recommendation to not hold a constant RPM for the break-in period as well as keeping the power up. I agree that you should dwell on the CHT's as long as they are safe, until break-in completes and you see the characteristic drop in CHT's. Flying LOP, my #5 is always the hottested cylinder, and #1 the coolest, with about 70-80F difference. ROP has a different spread, but I also only fly ROP during transitions like a climb or low level flight just before getting cleared for a climb. Quote
Alan Maurer Posted July 18 Author Report Posted July 18 Hi Everyone, Thanks for the notes. I now have a bit over ten hours on my new cylinders. Did Switch from 75% to 65% power every 15 minutes. We are going to check my #4 cylinder high EGT and switch the probes around and look at the spark plugs. Thanks Alan Quote
Pinecone Posted July 20 Report Posted July 20 On 7/18/2025 at 12:12 PM, Alan Maurer said: Mike Busch does not like top overalls, but he did top his Turbo 310 He is not against replacing cylinders. He is against changing all the cylinders when only one or two are in need. I had Dan ceramic coat my plane. STUPIDLY slick looking. I will try to add some pics when I am on another computer Quote
M20F Posted July 20 Report Posted July 20 9 minutes ago, Pinecone said: He is not against replacing cylinders. He is against changing all the cylinders when only one or two are in need. The amount of money wasted on cylinders in aviation is amazing. If I knew what I was doing I would just start selling cylinders. It seems to be about the only way to get rich in aviation. Quote
N201MKTurbo Posted July 20 Report Posted July 20 5 minutes ago, M20F said: The amount of money wasted on cylinders in aviation is amazing. If I knew what I was doing I would just start selling cylinders. It seems to be about the only way to get rich in aviation. Air Power beat you to it. https://www.airpowerinc.com/cylinders Quote
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