Revelocity

Best of luck with her and I'm glad to see this boat getting another lease on life. The drive heights came from the factory optimized for 4 blade Bravo's (or Hydro's although Hydro's are hard to plane off with). So unless there's shorty lowers and or drive spacers installed, the drives are where they ought to be. As I recall you can use -1" shorty lowers with 5 blade props on the 390 (same hull) so that may "work" for the heavier 410 boat. Running a 1" shorty increases top end a couple miles an hour but also makes planning harder. It's hard to say what the cruise impact will be considering the prop change.

thirdchildhood

What issue? I'll check if I have it.

veloc410

I think it was in a 2001 powerboat boat issue. Maybe right on front cover. I have a poor black and white zerox copy. I'll look at it tonight and put a link here

veloc410

It had 28 pitch bravo 1's. I got a set of 30 pitch sl4 props from Ron Hill. Hill marine. I picked up ten mph at 3200 rpm, now 41 mph at 3200 but still not enough. Should be doing 50 or better. I measured my propshaft C/L, it is 3.5 inches below deadrise. A little high I think. You can see the props are pushing water above surface. The fountains I read are running 4.5 inches below deadrise with a similar stepped transom. I just picked up a couple 1 inch spacers and waiting for them to get dropped off. I brought it up to 5000 briefly, still had throttle left and wasn't trimmed out plus one tab wasn't coming up (solenoid). Any way she isn't grabbing enough water. I let you know what it does with 1 inch spacers. I want my cruise, that's where it will be running most of the time. Not to mention efficiency

veloc410

Revolocity, are running 5 blades now? That is an option for me as well. Thank for the reply by the way, I just sold a 1996 320 about a month ago

Revelocity

Nope - the extra top end with shorties and 5 blades wasn't worth the cost and the other trade-offs for me! I'm happy with my 4 blades, Maximus 5 blades may give you a better bite if the 4 blades aren't doing the job for you.

Powerquest230

28 Bravos sound small for the power I'd think you would be running 32's. I'm running 55 plus depending on the water with 30's on my 320- I'd think 60 would be a nice easy cruise on your 410. The 410 isn't much slower than the 390 is it? Thought it was heavier...

Powerquest230

Thought one of the Velocity regs here just had a set of 32's in swap shop.

veloc410

390 is lighter. 410 is taller, maybe a tad longer. I have 30s now. It's thinking 32s. I have 1 inch spacers to try. Then I go to 5 blades

Rippem

Pete,
got your text a couple weeks ago...just haven't gotten near the 10 yrs PB magazine library I have packed away and crazy busy otherwise.
I will get there eventually, and when I lay my hands on that issue it's all yours.