If you have an automotive inductive diagnostic tach, you can use that. You just have to divide the reading in half as a two stroke fires twice as fast as a four stroke.
according to marine engine theres several props that can be used. I see a 9 1\4 X 8, a 10 x 5, and a 9x 10. the prop thats on it is 9 1/2 x 10. Whats supposed to be on it?
what came with the motor is informative but...generic you should still install what is optimum and needed for your application anything else is a compromise
