I run the new cut Poulan 25 today on gas-methanol mixture trying to tune the carb. Engine started by flipping the prop right away however it was runnig ritch. I tried to tune it but still the full throttle was quite rough. I played with low and high setting as finally engine died. I couldn't start it any more. The reason - glow plug burned. I put new OS long (F) plug and tried to run in just on gasoline. Engine started by flipping the prop and it was easy to tune. I got reliable idle around 1700 rpm and WOT 7200 rpm with APC 17x6. This is all from the new cut engine that weights all together (with muffler and radial mount) 37.5 oz. For glow battery I used GP 3700mAh NiMh that weights 2.3 oz. So here is the performance of 40 oz power plant.

I think this 17 inch prop still puts to much load on the engine. I will buy APC 16x4W that should unload the engine over 9000 rpm (I hope). If so, that might be something good for Funtana 90 (maybe).

RysiuM