CONTINUOUSWAVE

Thank you, Phil, for the very good information.

I have just acquired a 1987 SUPER SPORT 15. I intend to use the original 1987 Yamaha 50-HP two-stroke-power-cycle engine on the boat now; it's in good running condition. I tested the boat when I bought it, but the tachometer was broken, so I couldn't get any good test data on the 10 x 15-pitch alumi...