I have a 1976 15' tri hull with a 1976 70 hp Johnson. The previous owner put in a new speedometer and per that at wide open throttle I can get to 29mph. Is that pretty good for this size engine in this boat? Or should it be faster?
It's very consistent. It starts and runs reasonably well for an old motor when cold, but, after it is warmed up if I stop and let it idle it will die as soon as I try to throttle up. It will not run on throttle up for a few minutes. After about 5 minutes of trying choking, using the warm up...
