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Ruby Red Lip
 
Group: Forum Members
Last Login: 11/23/2008 8:49:41 PM
Posts: 20,
Visits: 46
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| anyone know how to make this thing go any faster! its on a bay boat it does 46 and i want to go faster it has a 3 blade 14 1/2 x 17 stainless prop and turns 6200 i run it at 6000 and no jack plate or a little less it runs 47 1/2 at 6000 with an aluminum prop and no jack plate. if i had a jack plate and 14 x 20 prop do you think i could make 52 mph @6000 rpm?
big fish little fish it doesn't matter they're all fish!
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Trigger
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Last Login: Yesterday @ 6:54:17 PM
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I'd have to know what kind of torque that 20 prop was putting out. Ideas like this are what lead to engine failures. The motor can only produce so much horsepower, which is a product of your torque and your RPM. Exceed it, and you're likely to pop a piston, valve, or worse. Some of the smart guys on here should be able to help you, though. I know for a fact that you'll definitely cause more wear on your motor than designed for if your original setup was stock.
You can run, but you'll only die tired!
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Trigger
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Last Login: Today @ 1:20:42 PM
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I would go with a stainless prop to begin with. It will give better performance usually. I would go to Accuprop next to Bahia Mar and see Danny. Tell him what you have and he will give the best prop setup for your application. He may even have a few to test with. Another performance item would be engine height. I would recommend having someone look at that to see if it is set correctly. If it can go any higher, some of the drawbacks are blowouts in turns and prop venting when trimmed in waves. This is why I say to have someone look at it for the height.
Davlor Marine, LLC Boat repairs and detailing 850-777-7303
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Grouper
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Trigger
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Last Login: Today @ 1:20:42 PM
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ooh, let's put twins on. 
Davlor Marine, LLC Boat repairs and detailing 850-777-7303
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Mingo
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Last Login: Today @ 1:09:48 PM
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| Heck I dont mind running in the 40s. When you put the twins on it, I take the 150 that you have now.
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Snapper
Group: Forum Members
Last Login: 11/7/2008 6:27:46 PM
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| I would be interested to know what length bay boat you have. I had a key west 19'6" with a 150 two stroke and it would only do 47 mph. You might check out yamaha's web site and look at some of their performance bulletins for that motor. You might get lucky and find your boat with that particular motor on it. That could give you some helpful guidelines.
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Grouper
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Last Login: Today @ 1:14:55 PM
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I have the F150 with that same prop on my Nautic Star 1900 Bay. It will do 53mph at 6K rmp with just me and a tank of gas. Drops to 48 with 4 adults. Don't see a need to go any faster.
DFA
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