will a 4 blade prop work on my i/o boat?

Question

I have a 1993 baja 190 es with a 454 c.i. motor, it also has a mercuriser alpha one I/O. i use it for wake boarding, it presently has a 15 1/2 " Q.S. 3 blade prop , I'm thinking a 4 blade will get it on plane faster only thing is all they are showing that the 4 blades are only 14 1/4 should it make much difference?

Answer 1

It appears when going from 3 to 4 blades you need to reduce your pitch by one inch minimum. Michigan wheel has some techs you can talk to. There are a lot of variables. Hull size. weight.
There seems to be less slippage with the 4 blade. So it bites harder which will lower your rpm's, which will slow you down. Going with less pitch improves power & gets your rpm's up.

Answer 2

When change to a 4 blade you usually keep the same diameter an drop 1 pitch for the 4 blade.Dropping1 " in diameter will make a big difference you will have to go up in pitch 1 maybe 2 deg Contact a prop shop they can get you right on have your max rpm when you call.

Answer 3

The prop isn't not person-friendly to get off, bend out the three tabs on the washer in the back of the nut then do away with the nut. make constructive to not loose the washer in the back of the prop, they have a tendency to adhere quickly to the back of the prop in the event that they are greasy. in case you in elementary terms choose a splash extra backside end ability drop the pitch one variety. Pitch runs in extraordinary numbers so in case you have a 19p pass to a 17p. length and pitch are often stamped on the area of the prop or could be located in the back of the tab washer on the face of the prop. As a regular rule any nick interior the prop is in basic terms too lots, they'll reason cavitation (small air bubbles) around the prop and decrease the chew it gets interior the water. For a three.0 follow the three blade.

Answer 4

go straight across with the pitch and the one inch drop in diameter will weigh out perfectly. ok, 1 1/4".