Bax, I have an FL-70 side mounted in a GP Cessna 182 turning a 12x6 Master Airscrew 3-blade prop and burning Powermaster 15% Nitro/ 18% Castor&Synthetic. I ran the engine in on a stand with the fuel mentioned before and a Top Flite 13x6 prop turning 9800 rpm at full throttle. I had no problems on the bench, but I have not ran it in the plane sideways yet. I noticed that with the breather nipple connected to the muffler I got allot of oil gushing out around the breather nipple. I read in a couple of posts about people disconnecting breather from the muffler and allowing it to vent out the bottom like normal. Will this cause any damage to the engine. I also have read about premature wear in the valve train/camshaft. I am reading about people removing the seals on the rear bearing to help lubricate the engine. Is this advisable or will it void the warranty (which sounds like OS isn't honoring)? Should I be concerned? I was influenced to buy this engine after reading the reviews in RCM/MAN; and I am starting to feel like I should have bought the Surpass II the more I read about the engine on RCU.

All my engines are OS and up until now I have been a die-hard OS fan.

Looking forward to your reply. Gene