prop venting
 

i have twin 200 promax on a 27 activator i run with 26 hydromovtives and was wondering any benifit to venting props . by cutting holes thanks

Re: prop venting
 

Are you experiencing any difficulties getting on plane, now? If so they may improve your planning capabilities.

Julie

Re: prop venting
 

have to feather it getting on plane , it is ok when i use bravos but not so good with hydros but top end is 3mph better with hydros

Re: prop venting
 

If you are feathering them, you don't want to vent them. They are already venting themselves.

This is one of the issues with the blade design on the Hydros. This is also one of the benifits the blade design of the Bravo 1 offers. You may get the best of both worlds if you Lab Finish the Bravo 1's. I'm only assuming the Bravo's aren't Labbed.

Re: prop venting
 

Do you have flare rings on the Hydro's? On the aft end of the prop the tube should increase in diameter. If you don't have the flare ring installing one may eliminate the prop ventilation while getting on plane. You would have the best of both worlds without the cost of a lab finish.

Matt

Re: prop venting
 

The diffuser may or may not help your planing.

The diffuser may or may not affect your speed negatively.

Re: prop venting
 

i have no rings on hydros the bravos were nice all threw the powerband but the hydros were real nice at top end in nasty water.the bravos were slower a wot and a bit flighty. did a say the activator is a step bottom.the hydros dont seem to be wider at the aft end.

Re: prop venting
 

The flare rind may reduce the ventilating while getting on plane. Yes, the Bravos are a better all-around prop than the Hydros are on your boat. ]

Flare rings can be installed on your props easily, installed they are $40 each.

Matt

Re: prop venting
 

have to put it back in the water and mess with it a bit , thank you for all your help. be in touch

Re: prop venting
 

Throttle up vented my Hydro's, made a huge difference. It allowed my 250 Efi's get to get that "jump" they needed. Had similar experience with the Bravo's.

Re: prop venting
 

Johno, this is kind of a different subject but,

The 3 Litre Mercury's have had low end issues for years. We used to actually package the 225's with a small hub Trophy back in 1995 just to give the new owner a prop that would ventilate enough to get the boat on plane. Unbelievable.

We started the Bravo 1 venting when the 300 ProMax was released because the low rev limiter caused us to prop the engine with very high pitches. This in turn caused planing issues.

I voted to put the PVS system into the Bravo 1 when the prop was retooled in 1998. I didn't get my wish. I guess it does give BBLADES, Throttle Up, and other HiPerf prop shops another operation we can offer to enhance our customers set ups. It isn't required on all of them.

Re: prop venting
 

i think my problem is only going to get worse . as i am raising the motors up. these motors are 98s offshores merc only made them 2 years i think. they are 15inch now with a five inch spacer, i am not even sure why the hydros make it faster i was told by a lot of people that the bravos would be faster but who knows it is the only step bottom activator out board model hull #1 thanks bruce

Re: prop venting
 

Bruce, your right, they were only in production for 2 years.

Let us know how the testing goes.

Come on spring!!

Re: prop venting
 

brett you are a world of information thanks for all your help with these motors talk to you soon bruce