Quote Originally Posted by cucv View Post
@Hayden tell us about your prop with this setup and engine rpm surfing and cruising.
I had an ACME 2775 the first year (2021), 15x12.5x0.75", but fully loaded it still really struggled at my elevation, 10deg pitch, and had very high rpm's (4800-5000). If you look back at my post history, I was asking about it that year, wondering if I was going too high. I called Indmar and they said it was fine upto 5200 but many of the veteran members on this forum advised against running like that year over year. That's one of the problems with going down in pitch is that you go up in RPM's.

Late in 2021, I called ACME and asked them what they had heard for boats pulling over 6k of ballast and I can't remember who I talked to but they recommended the 3407 (15.5x13x0.150") for all the Moomba +6k ballast, 2021's. They said the 3407 was performing the best for that weight/elevation class with both the Mojo and Makai.

For 2022, it was a game changer in terms of lowering rpm and didn't struggle at all with the load. I ran it flat out, unballasted with the 3407, two weeks ago and was at 38mph. When I ran it last year at 10deg pitch, fully ballasted, 11mph, I would be around 4300-4500 rpm depending on headwind or the amount of extra people on board. At 9.5deg pitch, same conditions, it would go down to 4100-4300, at 9deg pitch, same conditions, it would go down to 4000 or so.

I think the only time we've gone below 9deg pitch was a friend who had skinny 110 lbs kid wanting a flat wave for skim tricks.

Just remember all the things to consider: pitch-of-boat/density altitide/prop diamter/prop pitch/prop cup/total weight/headwind


....not that you should be surfing with headwind but the season is short and there are only so many weekends in the summer!