I know their 4 blades are 15.25 diameter. That is what they are sending with our engines in a 24p. I have no experience with their characteristics but the Revos have absolutely blown away any comparisons on every boat I've put them on. Even down to a flat bottom aluminum boat.

I may be wrong in saying the revolutions would be a better choice than the suzuki 4 blade props. I doubt it, but I have not ran the Suzukis to compare. However, I do know that if you are having cavitation issues the best step in the right direction would be ditching a 3 blade wheels. As long as your engines arent too high that is. I doubt they are or you would be having cavitation on the top end, not while plaining.

I agree, 1.6 mpg is impressive. I'd be curious what the original burn rate was since the 280 was never offered with big blocks.

It happens at any speed, I have tried trimming up and down with minimal result.

If you are in town please stop by, I need advise to fine tune this experiment.

Generally speaking if it is cavitating at most all speeds then yes the engines are too high.

I agree

FYI, filled fuel tank this morning with 80.7 gal. Did 157.1 miles which means 1.95 miles per gallon. I was doing 1.55 with inboards. 21% better fuel economy.

Did you get to try moving them down?

I’m hoping to do it next week

Took boat to 20 hr service yesterday (had 43 already), told service owner about issue ventilation/cavitation and to lower engines. He insisted the issue must be the wrong props so next week sea trial again, will see...