Thanks to your help in this forum I have converted the above to short shaft; am running a 14 feet rib, weight approx. 200 pounds plus engine, 1 person and fuel. To begin tuning anybody can suggest an appropriate propeller pitch? My goal is to be able to glide at low rpm and obtain maximum rpm when needed. Can somebody btw. tell me what the max rpm and idle rpm for this outboad is? Thank you, again. It is exciting, being new to this, to convert long to short shaft with all it implies ... and see it working !! I think my actual prop is 10 x 15, but it is hard to read.