I have a 1976 Vector with a 1978 Mercury 1150, 115HP and power tilt/trim.
I have the older style Mercury lower unit with the slightly smaller
diameter prop hubs. I wrote to you in April for your recommendations
on what pitch and style of prop to use for skiing and top speed. You
recommended a 19P for skiing and "for top end use a 22 or 24 small
blade chopper or even a Yamaha drag prop of the same pitch if you can find
On Sunday I took your first recommendation and tried out the 19P. I
popped out on a slalom ski great, and the boat had more to go so I expect
barefooting will be easy. Even with four people and a full cooler of
beer the boat would do 45mph. I had just unloaded the passengers and
coolers when a Checkmate with a 115HP and a 19P prop appeared. We
raced three times, and I had him on holeshot and top end. According
to his speedo we were approaching 50mph. Thank you for your
Would you please clarify what a "small blade chopper" prop is so
I can try your top speed recommendation?
Small blade choppers were used on the old inline motors in the late 70's
and early 80's. They are identified by their 14 inch diameter.
The newer 14 1/2 diameter choppers will not fit the inline gearcase.
If you modify the new prop by removing the weed cutters, it can be made to
fit. Search the net for the old inline chopper as it is faster and
works better on your boat. The bonus is because they are old, they
are also cheaper.
whatever questions you have to IHRTechTalk@yahoo.com.
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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.