what size starting prop?

[red_chaser]

I've got 70 hp 1977 Johnson, model 70EL77S, on an old 1977 VIP tri-hull ski boat. Its 16 feet long by about 6 feet wide.

What whould be the ideal prop for this guy?

-thanks!

 

[steelespike]

Re: what size starting prop?

The best results would be to run the present prop get us the size and the wot rpm and speed.
If I had to guess a 13" pitch.