I wondering what props I should be using on my 1999 baja boss 302. I have 7.4mpi motors with bravo 1 drives. Only other thing done is Stanless Marine Exhaust, Right now I have some 3 blade 25 props. This boat wont spin the props over 4100-4200 right now. It is topping out around 60-61 on GPS. Props have a few nicks in them.
I know its a different section but, I cant get the water temp over 130 on this boat. Im wondering if its not hot enough with the efi. I just put new therostats in. (160) Any help would be great ,
Thanks
Brendan

You should have a prop that gets you right about your engines WOT rpms. I am guessing that is around 5000 with the 7.4ls. You need to prop down in my opinion to start off with. I would also try a 4 blade vs a 3 blade for your boat. I would probably try a 22P 4 blade B1 or if you wanted to stay with 3 blades try a 21P Mirage plus. Get the props labbed as well. This will get you more rpms out of them (you will be able to run a higher pitch prop). I do not think you will get much more speed out of your boat until you up the engines hp though.