What is the expected prop slip factor for a 4 blade merc Trophy plus 12-15 %?

It depends.

We did a 27 Trophy for a Stroker Bass boat / 225 ProMax last summer that ran 5% slip. (1.87g.r., 6700 rpm, 87mph)

Other applications will run in the numbers you mentioned. Depends on hp/wt ratio, hull design and a bunch of other stuff. If your in the 12% range with most boats, your doing well.

224

We need more information;
What boat are you going to put the Trophy on?
What kind of power?

Matt

I currently have a 23 P trophy plus on 24 ft Superboat with 250 EFI. runing 6000 RPM at 66-67 MPH. I do not know the history of the prop but it was modified.

Slip appears to be very low for the speed/RPM I am running. %?

11% is pretty good. I'd say, if the low end and mid are as good, your there.

anytime you run a trophy prop you have to add 1 in of pitch to figure out your slip .a trophy is a progressive pitch prop. a good slip factor is about 10%.

jerry is correct in that the Trophy propeller is progressively pitched. This means the leading edge is at a lower pitch than the trailing edge. The overall pitch still remains as stamped. Therefore it really isn't necessary to add 1" of pitch. The old procedure was to add an inch of pitch if the prop is cupped. Most all props are cupped today. As well, most props are progressively pitched.

I need to check the low and mid range numbers. Thanks you for the info you have all provided!

If I send in the prop can you determine whats been modified from stock Configuration?

The hot prop for a 24 super with a single 200 is a trophy ?