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ok so i built a new surface drive style that i put into a 15 foot price craft runabout cause i didnt now how well the drive was goona work. i am using rx7 13b rotary engine! with a mercury piranha prop. so any way i took it out for test and it shoot a roost like ive nevver seen! and rides soo smooth it makes my 15 runabout feel like 20 footer i can cruize at 65 mph but ime only about half throttle at just under 6000 rpm . but when i try and go over 6000 in 3 gear my prop blows up, even when its not in the water! so PLZ help any advice on good props that can go too around 8500-10,000 rpm rang that is what iam capibal of doing

That sounds VERY cool. You're gonna halfta post some pictures! I would think you'd be looking at some sort of large diameter cleaver....they usually have good grip and seem to be the choice for other surface drives.

Pictures! Pictures! This does sound totally cool and am curious more about it without giving away all your trade secrets. Also welcome to HBPC!

i would say you need a prop known for running huge boats for the strength i would also try a bravo 1 prop.... so strong

we are going to have to see photos..... it sounds like epic fun!

thnks guys. i will post some pictures of the other boat my dad is working on cause my boat is in storage right now. his boat dosent have problems blowing the prop cause hes got a big clever style prop but hes also is using an OLDS 455 rocket engine and dosent usual turn past 6000 rpm

Also ime using a 3 speed semi automatic transmission!

this is my dads boat that he is building mine is in storage. he built the drive alot bigger than i did this drive is also realy cool because it is good for rivers sandbars and logs

post a video,, when you get yours out again,,