Blackbart5
Seaman
- Joined
- Jun 8, 2015
- Messages
- 68
I have a 1988 harris 28ft flotebote with the 3.0 i/o alpha one. The engine runs tip top( new cap rotor, plugs, wires, points), tuned it up, dwell and timing are correct(6btdc and 32 dwell). purrs like a kitten. Rpm at wot is supposed to be 44/4800rpms. I just switched props AGAIN to a 3 blade aluminum 15 1/2x11. Rpm's were reading 36/3800rpms....thought maybe my gauge was off, so I hooked up my meter to the engine and yup, it's right. All five of us on board at wot was 18/20 using gps. Choppy water......I'm out of ideas to get to my rpm's, this is my 3rd prop.............17pitch, 15, and now this 11............diameter has only gone up 1/2 through all 3. Any ideas please????