Yamaha 130 wot rpm

[wmvoss]

I have a 1999 Yamaha 130 saltwater version that will top out at only 5400 with a 14 x 14 pitch prop on a 18 foot Avocet (flats with a tunnel and about 2200# loaded). The prop guru thinks that the computer module is retarding the ignition advance and preventing it from topping out. The engine runs fine otherwise, but I was thinking that I should be able to run a higher pitch prop. I need help from you Yamaha experts or the name of a good mechanic or shop near San Antonio, Texas.

 

[Forktail]

Re: Yamaha 130 wot rpm

14 X 14?? What kind of prop? What speeds are you seeing?<br /><br />The engine should run anywhere between 5000-6000 rpm. Some people like to run up at 6000, but there's nothing wrong with 5400 if it's performing the way you want.<br /><br />Try the 13 1/2 X 14 Stainless. It should give you 26-34 mph and more rpm. Or the 13 5/8 X 13 will give you 24-31. Heck, the 13 1/2 X 15 might even be ideal at 29-36 mph.

 

[wmvoss]

Re: Yamaha 130 wot rpm

The prop is a custom made stainless cleaver style 4 blade designed to bite in less than a foot of water. The top speed is about 34 mph.

 

[Forktail]

Re: Yamaha 130 wot rpm

Speed seems ok and you're in the correct rpm range.<br /><br />But if you want more, you could try cutting the diameter down 1/4" and re-cup (to keep the bite), or drop pitch to 13. You may not lose mph dropping pitch, and may even pick up a mph or so with the right cupping.