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Discussion Starter · #1 ·
Thinking about switching props to a different pitch.....Question is.....

Is it worth the 4-5 mph gained........To lose the Out-of-the-Hole punch.....

What are you thoughts??????
 

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What kind of boat do you have? Are you into water skiing? Do you have a hard time getting on plane as it is right now? Things to take into consideration.
 

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Discussion Starter · #3 ·
I have a 19' Cobia,...No skiing...No problems getting on plane(and don`t want to have).....just interested if extra speed is worth giving up the quick out-of-the-hole
 

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There's only 1 prop for your boat, and that's the one that allows you to run your engine at the munufacturers recommended max rpm at WOT. It's matched to the gear ratio in your outdrive. Manufacturers equip the boat with the correct prop/gearing when they build it. They do take several assumptions as to how much fuel, people, gear, and temperature/humidity, driveability at all speeds and make the best compromise. Maybe your useage (loading) is far different than the average that the manufacturer used, and you could go up(or down) a bit in pitch. Does you boat run at max rpm at WOT?

Yeah, you can change pitch to give you extra speed, but your also gonna pull more rpm, and increase the torque loading on your engine when you get up on plane--both will reduce the life of your engine. Think of your boat as having only 1 gear, and that gear is determined such it allows you engine to turn max rpm at WOT. What you're looking for is a multiple gear transmission. Both Mercruiser and Volvo are working on them (2 speed trans), but they're not in production.
 

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Discussion Starter · #5 ·
QUOTEYeah, you can change pitch to give you extra speed, but your also gonna pull more rpm, and increase the torque loading on your engine when you get up on plane--both will reduce the life of your engine. Think of your boat as having only 1 gear, and that gear is determined such it allows you engine to turn max rpm at WOT. What you're looking for is a multiple gear transmission. Both Mercruiser and Volvo are working on them (2 speed trans), but they're not in production

Good point...I don`t want to risk blowing a motor.....besides...It really isn`t a go-fast anyhow
 

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I say that nothing beats getting on plane. I have a Bravo 3 on my boat. I get out of the hole fast and I top out at about 50 - 55. Plenty for me.
 
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