Quote:
Originally Posted by infanterene
Unfortunately I think my motor is a little too low. Im at the last hole, so no room for adjustment.
Your 4B 15x15 would probably be a lot better than my 17. The dealer offered a 3B. Is your prop a BRP prop?
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You're way down in RPM, so I suspect you could easily hit 50 mph with the right prop. That motor develops max HP at 5350, so it's not putting out it's max HP with your current prop. I think Keys Cruz' rig will do over 50. You should be able to have the mount holes redrilled higher to pick up some more speed AND MPG!
My 15" prop is a PowerTech ELE4. My dealer didn't carry any BRP props and only had used props for trials. He said the 2.7L V-6 typically can't turn a Rebel fast enough on a boat like mine and that it's normally used by the guys with the 3.3/3.4L big block V-6, but it will fit your motor so I'd try a 15P version if they'll let you.
I have an aluminum Michigan Vortex 4B 14x20 that I had repitched to 14x18 which turns about 5500 and I use it for a spare. I also have a 14.125x20 4B Michigan Apollo that I once hit almost 50 mph with; it gives a little better mileage than the 15x15, but it only turns about 4600 with a very heavy load and 5200 with a light load and is much slower to get on plane. I also tried the same model PowerTech in 15x17P size, but it's down about 200 rpm compared to the 15P version. The 15x15 jumps on plane at only 40-45% throttle, will stay there down to about 12 mph, and turns the same max rpm regardless of load. I can basically run any speed I want with that prop, so I've been running it for about 6 years. Still not sure it's the best, but I think it's close!