I have one on a Funtana 90 (with pipe) and it works fine. Spool up is a bit slow, but I run a heavy Dynathrust prop. It would spool quicker with a wood prop, but the 18" prop is too close to the ground for me to run woods. I'm real happy with mine - very powerful, never had a problem with it, and starts and runs exremely reliably. But considering the cost, it ought to.