Prop Blowout
#1
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Prop Blowout
Ok, so I have a few questions. This is my first boat with a 454/330 merc and bravo 1, all past boats have been small blocks and alpha's so maybe I just have to get use to the extra power I now have.
The boat is a 23' Mach 1 454/330 w/ bravo 1
23p Mirage (stainless)
WOT 4850 rpm @ 62mph
I think for the most part I'm pretty pleased with the prop, I think it carries the bow pretty well, I see water breaking about where I stand in the boat, maybe 6-8' forward of the stern.
My big question is I noticed the prop loosing it's grip a little during planing. I get just about on plane and hear the motor start to rev, so I back off a touch and it grabs again and keeps going no problem. Then I notice if I bring the drive up too quick it loses grip again, so I back off a touch and no problems. I don't hammer on the throttle, I ease into it so I know that's not the problem.
Is this something normal for a BBC to do? Do I just have to get use to it? Any help or suggestions would be great, and thanks in advance!
Jay
The boat is a 23' Mach 1 454/330 w/ bravo 1
23p Mirage (stainless)
WOT 4850 rpm @ 62mph
I think for the most part I'm pretty pleased with the prop, I think it carries the bow pretty well, I see water breaking about where I stand in the boat, maybe 6-8' forward of the stern.
My big question is I noticed the prop loosing it's grip a little during planing. I get just about on plane and hear the motor start to rev, so I back off a touch and it grabs again and keeps going no problem. Then I notice if I bring the drive up too quick it loses grip again, so I back off a touch and no problems. I don't hammer on the throttle, I ease into it so I know that's not the problem.
Is this something normal for a BBC to do? Do I just have to get use to it? Any help or suggestions would be great, and thanks in advance!
Jay
#3
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#5
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There is a simple solution to your issue. We can Lab the propeller into a Mirage Plus while dialing in the rpm you need. This process will improve the performance from planning to top end.
Call us if you like and I can explain the process in depth.
Brett
Call us if you like and I can explain the process in depth.
Brett
__________________
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
#6
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Join Date: Dec 2000
Location: EASTON MA.
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this is your best bet cause at 4850 you are 150 rpms higher than what a 330hp 454 calls for so with bret getting you hook up better your slip will come down a 100rpm and you will pick up speed with less slip, also if you want new talk to Brett about the rev4 by merc its a good 4 blade for deep drives like your boat has. measure from the keel to your prop shaft if its between 6'' to 7 1/2'' its deep if its 5 1/2 to 4 1/2 its good for a b1 prop. but brett is known for doing a nice job labbing mirage and rev4 props for vee hulls with deep drives and pick up handling and speed. 920 295 4435 that should be bretts phone#