Hey guy's, Hope all is well! Been awhile since I posted and I wanted to give a shout out to Hydromotive props. Tested a Bravo 1 26 4 blade over my 27 3 blade. Went from 36mph @ 3300 to 44mph @3300. Once I reached 70 @5000 it couldn't hold and would break loose like clock work on several runs. Tried the Hydromotive 26 4 (cleaver style) and that was bad..... No bite and went to 5800rpm like it was on ice. Called Hydromotive, spoke to Todd and he recommended the 26 5 blade. Did the install and 46mph at 3300 and 76 @5300/5400 (running 5 1/2 lbs of boost) and the math says I have 18% slippage. Going to put on a imco shorty, my prop shaft is 6 inches below the keel so I hoping the 2 inch decrease in depth will get me a few more mph? Ill update after I give it a try......
(My stock Bravo 3 blade 27 was a pain, would blow out all the time and 72 to73 mph at 5400/5500 rpm )

just went through a lot of that. I was 7 3/8" deep, tried -3's, had to add 1" spacer just to get on plane with 5 blade 28. had 24% slip. I think you will get more slip. that will cause you to need more blades like you did from 3 blade to 4 blade to 5 blade. more blades cost lost more money.

That was my thinking also about the lower unit and getting more prop slip but my buddy wants me to try it so Ill give it a try.

what kind of scarab is it how and what engine with what power? I could see blowing out a 3 blade with a ton of power but a 4 blade bravo is seems like something could be causing it to blow out .
I had a 29 800 hp with a 26 4 blade turning 5800 -6000 rpm with a 1 inch shorty and it ran about 83mph

Hey Hull, Its a 1988 Scarab Concept. Padded bottom single step. Small Chevy bb 489, flat tappet hyd 580, 8.5 pistons, 502 rectangular port heads, 174 B&M blower with chiller. With the small snout pulley dyno 684hp @5300 (the motor would go to 5800), I was running mid size pulley at time of testing on the water making about 600hp. I have our boats at Great Oak. Maybe we have run into one another at Jelly Fish Joel's?
The boat is all white, pro stock hood scoop and has a gloss black windshield and black side air intake with the exhaust exiting the transom above the swim platform.