Engine/drive swap...what prop do I need?

[metal249]

I just did a complete renovation/rebuild on my 1986 SeaSwirl 17ft bowrider. I swapped the OMC 3.0L Cobra with a 1996 Volvo Penta 302 H.O. SX Cobra. The motor and drive came out of a 1996 Sunbird, 19 or 20ft. The prop that is on It now is a 3 blade 14 1/2 X 19. I don't know for sure how much the boat weighs, but probably about 2000-3000lbs. I know I probably have to change the prop, but to what?

 

[steelespike]

Re: Engine/drive swap...what prop do I need?

It would seem you will need more prop but run it with the present prop and get us the max rpm and speed.If the motor is healthy don't worry about a little brief over rev to get some figures.

 

[metal249]

Re: Engine/drive swap...what prop do I need?

Thank you, any clue what WOT should be on that motor? Also, what ratio is that outdrive?

 

[steelespike]

Re: Engine/drive swap...what prop do I need?

I believe wot is 4,600 ratio 1.66:1 Usually stamped on the outdrive