Vector/Merc 3.0

I am a little curious about prop selection and motor height on my setup. I have a 1983 Vector with a 2000 3.0 225 Merc. Included are 6in manual setback, 11 gal aluminum tank in the rear, dual cable steering, and foot throttle, etc. A 27 inch Yamaha through hub prop came with the motor. This prop was completely scary. I ran a cut 24 Merc chopper with my old 2.0 which was the best that I could find as far as handling. With this motor, that prop is just too small. I bought a Merc cleaver 28 inch and am curious what height should I run the motor. The gearcase has a LWP and has 1.75 gears in it. Thanks.




You have a real interesting rig to say the least. The three litre is very heavy so I'd try to get it as close to the transom as possible. Reverse the jack plate or mount it on the transom if possible. Run a drag plate or "whale tale" to help deal with the slow speed gallop that I'm sure it has. The prop shaft needs to be from 2" below to1/2" below. It's not that picky because the Vector was made to handle a 300lb motor not a 500lb motor. Any set-up will be a compromise. I think that you will find mounting the motor on the transom in the top hole (highest position) will exceed any set-up you have with the 6" plate. The weight is too much of a denominator.




Please submit whatever questions you have to  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.

Mark C.


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