Identifying prop size

[StevensMan]

SomeSailor told me that there is a website where I can get my prop dimentions from the number stamped on it. I know it is 15 inches but do not know if it is diameter or pitch.
Mike,
Can you post this website address here please?

Thanks,
Anton

[SomeSailor]

I forgot about that.

Here's one: Prop Number Conversion (http://www.boat-props.com/match/match_mercury_props.html)

Use that to find the Michigan Wheel Part Number and then look at their data.

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[StevensMan]

Thanks, it worked. My prop has 48 78116 A40 casted on it and according to the site it is 15-1/4" diameter, 15" pitch Obviously too small but I heard that if I want waterski with this boat I can go with smaller prop, just do not allow RPM to go to high.
I'll try something around 16X16 next to see how it works.

Anton

[SomeSailor]

15.25x15 is what the boat came with (with the 5.7L motor). When he swapped the 5.0 out... he should have pitched the prop a bit higher. I had a 16x16 on mine and it worked fine. 16" is the largest diameter you can go on an alpha drive as well.