I'll say this about my OS engines. I have a 91 4-stroke that has well over 500 flights that was broken in using the recommended procedure and it just finally decided that it needed all of the tiny little "o" rings replaced in the carb. I have done that and she is back to purring like a kitten again. This engine resides in a 4* 60 and on the stock 14 ounce tank will give me an easy 20 minutes of half throttle flying and more if I shoot touch and goes for the whole tank.

I've had 3 46AX's that were sold with the planes and I see all of them allot at the field and all 3 continue to run well and 2 of them are are two different H9 Twist's and are flown rather hard. Treat 'em right and they will reqard you with tons of hours of flying, run them too lean and they will eat themselves alive quick