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Thread: Ventilating a prop at home?
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09-16-2007, 07:45 PM #1Screaming And Flying!
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Ventilating a prop at home?
I threw a blade off my previous prop, a 4 blade bravo with 4 exhaust holes.
I borrowed a bravo from a friend and can barely get on plane, once I do It's good to go. Can I just drill holes in the prop for the exhaust like the previous prop had?
I understand this may weaken the prop and wondered if there is a special way it has to be done.....
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09-16-2007, 08:43 PM #2
As long as its his prop... sure you can.
I don't really know but I don't see anything special about it. I'm sure that this was some bass fishers or racers idea and not a companies. They usually aren't.
Are we talking the same pitch?'90 STV
'96 260
under construction
for far too long
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09-16-2007, 08:52 PM #3Screaming And Flying!
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It's 2" more pitch, but painfully obvious the lack of ventilation on take off is the problem. Once the prop slips a little it spools right up and takes off, but it takes 100 yards to get to that point.
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09-18-2007, 05:04 PM #4
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09-18-2007, 05:09 PM #5
Why are you running Bravo props.....why not a Mirage or equivlant that already has the vent holes?
"One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .
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09-18-2007, 05:55 PM #6Screaming And Flying!
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the boat came with a bravo that was ventilated, I also have a trophy, currently I am running a torquemaster the propshaft is dead even with the bottom of the boat. The trophy slips too much.
The bravo works well until I spend the $$ to get a 25" mid so I can get the propshaft below the bottom of the boat.
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09-18-2007, 05:58 PM #7
A good prop shop can cut them for you. Someone like Kevin @ R&R Prop Shop can do it on a CNC mill, so the holes match the Mercury PVS profile. That gives you the ability to partially or completely plug the holes to tune the ventilation.
In a non-outboard application, most of the time vent holes aren't required or wanted...with PVS spec holes, you can sell the prop to an I/O guy where other holes may send that sale off track.
R&R is 702-564-7502Keith-