Need help with my set up.....

[Olddawg]

OK, 1996 ZX180D, 1996 Mariner Magnum lll, Mercury Tempest ll 23 pitch SS prop, 6" Vance single adjusting jack plate. 59/60 mph with 20 to 22 psi water pressure and 5600 rpms at WOT. I need to know what the best prop and jack plate setting (starting point) for the boat would be to get a good hole shot with top speeds in the mid to high 60's...don't think I could break the 70's. I think the prop was the original prop that came on the boat when new.




Modified by Olddawg at 9:14 PM 1/21/2008

[Rich Z]

Start with prop shaft 3” below pad. Longer jack plate maybe the answer to get into low to mid sixties. I would also suggest having your injectors flow tested and cleaned assuming mag III is an efi. That’s about the most you will see out of a 150 unless you want some motor performance upgrades. Checkout Brucatosvs.com. They provide exceptional merc performance products and injector service.

[Olddawg]

This is a carbed engine so no injectors...