Does anyone know the proper number for a propeller that will reverse better than the one I have a 7P A1 3blade that came with the engine. I am able to get three sizes 1.8R8<br /> 2.9R9 <br /> 3.83/4r7<br />Any info would be muchly appreciated<br /><br />Shawn<br />Vahevala2@aol.com