Thanks everyone for this great information. Reading all the stuff people put about four strokes on other discussions made them sound like they would be a real hassle but from the explanations you all put this is of course just not true. I think for my next engine choice down the road I will be gettinga Four stroke and seeing what that can do for my planes.

One question I do have still is, I believe that 2 stroke engines need to be mounted on a plane upright while a 4 stroke can be mounted upsidedown on a plane correct? Is there a difference between the two when you mount them to a plane concerning this and what your limitations are? I have noticed that this is a concern when mounting for a cowl cover.

Thanks again for this great information.