mercury's web sit has this one dealeo where you can punch in the type of boat you have, length weight type of motor, etc. and it'll tell yuh about what prop to be running."prop selector" or something like that. on the other hand when you replaced your merc with a GM crate motor i think all their numbers go out the window. un- less for some reason you know what your Hp at the prop is. crate motor won't be the same torque(which merc won't give you info on-torque curves are a closely guarded thing)hp and WOT rpm range as a merc. all this crap matters big time as far as i can tell.blah blha blah bla. did that help? anyhow -another 2 cents
[ June 28, 2003, 11:47 PM: Message edited by: bordsmnj ]