Voo-doo/Merc 40 Setup

Hi, my name is Tyler and I own a voodoo in the Registry...its got a 40 hp Merc with a Hi Jacker manual jack plate. I only have an aluminum 17 pitch prop on it right now and I can go about 48-50 mph on a good day. I am going to get a SS prop but I am not sure what I should get. I have been told to get a chopper with cupping or a cleaver or something like that but I am not sure, and they are hard to find unless they are custom made. I think the chopper would work better cause they work at lower RPM or at least that's what I heard...cleavers like hi revving RPM motors..well thank you and give me as much info as possible. I know not many people know stuff about voodoos they are more into the bigger boats but this would be greatly appreciated.   Tyler

Tyler:

 If it were mine, knowing what I know about the old “CP” class race boats, I would try to find a 10 in. x 18 in. Merc Chopper, part #48-43592A71 or an 11 in. x 16 in. Merc Cleaver, part #48-849726A3.  The bad thing is the cost will shock you.  Either one will work well.  Check the APBA sites for used SC class props as you may find a bargain.  You might try to modify a 15 in. or 16 in. pitch three-blade through hub.  The results won’t be as good but if you can find the prop used maybe it would be cost effective.  Lastly a “good” cleaver is not RPM dependent and I have several with good bow lift as well.  The reason I would lean toward 16 in or so pitch is that a good 16 in. will turn less rpm and go faster than the 17 in. you have.

 

Please submit whatever questions you have to IHRTechTalk@yahoo.com.  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Thanks,
Mark C.

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