I have an OS-61FX with a gallon of gas thru it. running a 11x8 prop. She transitions excellent,,,idles great,,cant complain at all,,,,,,,,,,,,,,,,except the engines has a knocking sound at anywhere from half throttle to full throttle,,Ive tried leaning.richening and everything in between,,,,cant get rid of it.. I use Tower premium 2-stroke fuel,,and run an OS#8 glow plug. All my other 2-strokes dont have this problem.. Is this something I should be concerned with..or is the engine lobeing or is something about to go on it. Ive also tried different size props,, to no avail.

I would highly appreciate any insight on this condition.


[sm=spinnyeyes.gif] Thanks a million--you guys and gals are the greatest JIM