homelessbob

I am just about to get my boat back from my mechanic, he had it for the winter, I have a 1999 32 fountain with supercharged 502's also making 700hp and 750 torque. Here is the thing, when i gave him the boat it was doing 98mph and just about hitting the rev limiters, now we took the boat out and it did 90mph, but hit the rev limiters really easy. All he did was increase fuel pressure, and put bigger oil cooling systems. He says I need to change my props from Bravo 34p 4 blade to 31-32p 5 blades. can anyone tell me why such a change?

US1 Fountain

iTrader: (1)

Something ain't right. If it still was about hitting the rev limiters with the same props, it'd be going the exact same speed. But now you are hitting the limiters, you should be going faster.
Something else had been changed.

253

Has the speedo went goofy, maybe reading slower.

Beak Boater

Are the rpms's the same? Now you are going 8 mph slower? Not adding up. 5 blades are usually a couple of mph slower on the top end unless you put shorter drives on it, and your slip is really high.

RICHARD CUNY

Got To Test It Here In Nj Last Weekend 81.6 Gps 5,000 Full Tank Fuel Turning Props Out I Will Test Them In This Week End And Report Back.
Rich

99fever27

RICHARD CUNY

Ran It Again With Props Turning In I Lost A Few Rpm 48 Now And Just About Gets 80 Mph But Found Out My Tank Was No Were Near Full Only Had About 30 Gallons Of Fuel
Richard