Vaquero Prop Selection

Hi Randy,

I just bought a 1994 X Stream.  It's 16.5 x 90" beam with Vee pad bottom. Other than color it looks exactly like the Canadian built Vaquero that you have listed in the Hull ID section of your website.  The motor is a 1994 OMC, 115 hp, with power trim.  The prop shaft is 5" below pad. Currently using 12.75 by 23 OMC SST Prop and running 55 mph at 5500 rpm.

I would appreciate any help you can give with prop selection for this combination.  I would like to get more bow lift and speed while maintaining stock water pick up and rpm range.  I am looking at a bow lifting prop from power tech propellers (www.ptprop.com)  item number OM140PTR3R24S, 3 blade 13.25 diameter x 24 pitch.  I don't know if this is too much pitch for this motor, or would a 22 pitch be a better choice?  These props have more blade area and diameter than my current prop.  Therefore, I don't know how they will affect peek rpm.
Thank you for your time.

Bruce Nieuwkoop

 

Bruce,

With the OMC V4 try to run props that are around 13 inches in diameter. You will find the motor has a hard time running props that were made for V6's. You will find that your prop can be modified to work almost as good as any new one you can buy. The bigger props you mention will most likely turn 5000ish rpm. The propshaft height is OK. Turbo makes a good V4 prop that runs good. Try one at 22 pitch if you can find one. I've used them in the past and never got burned with a bad, poor performing one. That's the bad thing about mail order props, you won't know until you run it.

                                                   Hope this helps.
                                                          Randy

 

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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