there's a 25 ol with a box getting 81mph at 5300rpm what is his slip # prop is a b1 28 at 300more rpm 26 I would think would be at 81 or 5700 or 5800 be 83 what is the cal you use to find the slip? thanks art oh his is raised 3''

I tried a 28 5 blade maximus a few weeks ago,boat went another 1 mph slower on top end,stern lifted and bow steered,plus sheared off a prop shaft.You would probably be wasting your time unless you get one really worked on and have alot of time to have it modified,test,modified,test,re-test etc. It did have excellent cruise though,Smitty

In general 5 blade props aren't the answer to top speed on deep V's. I have been telling people that for years. There are exceptions to every rule though. Bajas with higher X dimension from shorty case with big HP can obtain a high enough running attitudes to not bow steer with 5 blades. We do also adjust the diameter to help the overall running attitude. The correct 3 or 4 blade propeller on a Baja is still the recommendation for all around performance.

There are many reasons a prop shaft can break. Just bolting on a 5 blade propeller isn't one of the main reasons to loose a prop shaft.

Boat was straining hard from 4800 to 5700 with 28 pitch 5 blade maximus,taking 3 times longer to pull the rpm's than with a 30 labbed,i think it just pushed the shaft past its limit when I was prop testing. What I think is shaft was at 95 % of its limit with the big tq and running my 30 and 32 labbed props,the 28 5 blade slipping signifigantly less put it to the failure point,it might have just been coincindental but there are no more 5 blades in my future ,Smitty

81 at 5800to 5900 flat water in the bay and river river 80 to 81 up and down my buddy was cutting his lawn 2 miles away he could here me on his lawnmower and I ran 10 passes easy love MY dry S/M LOOKS LIKE A 28 5BLADE this winteror 28/30b1

all set thanks bblades good talking to you .