Stratus with OS91SZ leaking badly

[sookainian]

what do you mean by 'much noise' how does it sound like ?

[heliroller]

Originally Posted by sookainian

what do you mean by 'much noise' how does it sound like ?

Make sure it is not pre-detonating. Clanking or rattling sounds. Could mean too lean or shims needed in the head. Also depends on what fuel you are running.

[Dr.Ben]

As you try to needle the top end, I would suggest you temporarily depitch the top end collective to the point the engine is just BARELY loaded at full throttle for more than brief periods. You need to get to full throttle and pitch and stay there for a while. It is critical in an OS to get the top end set correctly, or the midrange and everything else will be a battle. You really can't assess the top end mixture unless the engine can stay there for a while and settle down. You can make any engine appear too lean with excessive pitch and associated increase in running temps, especially if the high speed mixture is on the lean side to begin with.

Ben Minor

[Laurens]

I would run a little les pitch, that'll make the engine happier.