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Posts: 27
| I have an 04 Yamaha 150 four stroke on an 05 Alumacraft tournament sport 175. I bought the boat used and ever since I've owned it it will only get up to about 4200 RPM getting me to about 40mph. I know I should be closer to 6000 rpm wot...right now there is a 13 3/4 x 21 aluminum prop on the motor. I don't care so much about speed but I know its not good to not run your motor at proper rpm. Anyone have an opinion on whether the tach is shot, or if it is that big of a mistake on the size of the prop? Any idea what size I should go to? I guess my biggest weakness right now with the boat is hole shot, it takes a second to plane out. Stainless or Aluminum doesn't matter much to me, would the size be different between the two? And I have checked the height of the motor, the cavitation plate is right where it should be. Thanks in advance guys. | |
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