All you guys putting together the Rascal .40 for the first time, keep an eye on the aluminum straps that hold the engine to the wood mount. These tend to crack in time from the torque and vibration. I replaced mine twice. This may be more of a 4-stroke problem due to the extra weight and torque of a 4 stroker. Also, if your engine doesn't like to run inverted, you may need to add a on-board glow system. I started with a ASP .52 four stroke and it did not like running upside down. It had a lousy idle and would flame out at the lower throttle settings, (landing!). I tried different plugs, and went to a MPI on-board glow system, but didn't like the added weight. I finally switched to a OS .52 four stroke and the problem went away. Great engine and sound!

Jesse