70 HP 2 Stroke
Hi CJ,
I have the same motor. When I originally purchased the boat, the motor had a Yamaha aluminum 13 1/2 x 15 pitch prop. The motor would top out at 6,000 rpm. Too high for my taste. I replace the prop with a Yamaha aluminum 13 1/4 x 17 pitch prop. The change dropped the WOT RPM to 5,600.
By the way, what happened with the Tach? I get condensation in mine, but, Yamaha claims that is okay.
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Barry, AP
Aboard "SURPRISE"
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