I inspected the engine, inside and out, after I picked it up. It appeared that it had been run for one tank of fuel, or less. No burning, scuffs, or other potential damage was noted. Bearings had no rust. Engine seemed to be well taken care of.

Fuel tank is located approximately 1 1/4" behind back plate of engine. Center line of tank is less than 1/4" below fuel pick up at carb. I have replaced every gasket and "o" ring in the engine with OEM new.

Clunk in fuel tank drilled out as much as possible to accomodate large inside diameter of fuel line. No line restrictions, anywhere.

OS #8 plug. New and previously unused. This is the second of same type plug. Plug not the problem.

Cool Power 10% fuel. Castor,synthetic mix.

Bisson Pitts muffler. Have already tried plugging one exhaust tube with dissapointing results.

I've been building and flying for over 30 years, and I have only had a serious problem with one other engine, an OS 1.20 Surpass II back in the early 80's.

I starting to believe that what I have got here is a good weight for deep water rock cod fishing.

Silversurfer