1995 272 502 mpi , whats the stock prop?
 

1995 Baja with a 502 that has been rebuilt with a 540 crank and a mild roller cam. Does anyone have an idea what the stock prop is? I purchased the boat as a project basket case and it has a 24 prop on it now. I finally got it on the water after a series of false starts and at 3k rpm it was running 25-30 mph. Any suggestions would be greatly appreciated.

[QUOTE=carnutsx2;4805531]1995 Baja with a 502 that has been rebuilt with a 540 crank and a mild roller cam. Does anyone have an idea what the stock prop is? I purchased the boat as a project basket case and it has a 24 prop on it now. I finally got it on the water after a series of false starts and at 3k rpm it was running 25-30 mph. Any suggestions would be greatly appreciated.[

I would say that it had a 25 pitch 3 blade from the factory which most replace with the 24 pitch 4 blade, due to the 24 performing better getting on plane.

You sure not a 23” Mirage Plus ?

was the ecm remapped ? are you saying it will not spin over 3k ? I had a 272 with a 502mag mpi and would run high 50's low 60's I think it was a 25p 3 blade

23 Mirage +

I haven't had the ecm reflashed, I have not tried to spin the motor past 3,000rpm, I would assume that it would spin past 3000 rpm with more throttle. As I was out idling around varying throttle positions and checking for leaks I noticed that at about 3k rpm it was 25-30mph and in my simple mind 6k rpm would equate to 50 or 60mph. The boat came with a 3 blade 24 pitch 3 blade prop. On a good note it seems to pull up to 3k rpm without any hesitation or audible knock, next time ill plug in a wideband O2 sensor .

what do you mean 540 crank, is the 502 now a 540 cu in ?

Stock is 23 Mirage Plus and gave the best top speed. A Bravo 1 4 blade is a better all around prop.

yes 540 cubic inch of fuel drinking fun

so you are running all stock 502 mpi components on the new 540