Dear All,

I see a lot of posts regarding engines that are 10+ years old that seem to be running OK. I have myself seen a few physically that are close to that old. However, over the nearly three years of flying that I have had, I am on my 3rd 55AX in addition to a 75AX and 91FS. The latter two I have hardly use though. Now my question is, did the older engines have a better life than the new ones especially the AX series or are we doing something wrong. Note that we run in the engine by the book, set it a little rich on the high speed needle, use a super filter on the pump clunk, use 20% castor. Most of us on the field have shifted to Klotz-100 this season but we used castor earlier I personally never used nitro until this season. Also, though I have gone through 2 engines, a fellow flier is still using his original 46AX (we starter flying together) which still runs even though it has completely blackened externally. Some of my instructors 46FXs though vintage still run well

Ameyam