20 SF Prop numbers
1972 20 SF. 2001 yamaha 115 two stroke. Put in at local pond for shake down and anted to get some input on numbers I received via the Garmin GPS. All speeds are in knots. Prop tested is a yamaha aluminum 13 1/4 X 17 semi clever. I feel like im hitting the rev limiter at 5700 as I have throttle left and there is definetly a noise change when bouncing off 5700.
Trimmed all the way down:
3400 RPM 17.3 kts
4000 RPM 22.7
4500 RPM 26.2
5000 RPM 29.5
5700 (WOT) 33.4
Trimmed up:
3400 RPM 16.8
4000 RPM 22.2
4500 RPM 26.7
5000 RPM 29.9
5700 RPM 34.3
How do these numbers look? Surprised that speed did not increase by even 1 knot when trimmed up. Thoughts on other props? Thanks.
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