i have a champion 202 with a 225 mariner an im running a 4 blade trophy 25p im only turning 52-5300 rpm max what do i need to do ? move the motor change prop to a three blade tempist change pitch on prop somebody help me please

8" setback, motor set at 3 1/2" shaft below pad, 26 Tempest is the best setup.

Should be 74 mph @ 5,700 rpms.

25 Trophy *should* be running over 6,000 rpms, or to the limiter.

Check your settings, you might have an engine issue.

bet his motors too deep

new 8" jack plate i bought the boat two years ago good compression on all pistons maybe the motor is to low how do you set it at 3 1/2

Get a long level anything and place it against the bottom of the back of the boat and note its top position in relation to the bullet center of your lower unit. Get it 3 1/2 in. above the bullets center by adjusting your jackplate. That prop works fine up here. Altitude makes a lot of difference. Check throttle by looking at butterflys to be shure their going full throttle. See this alot, especially with hot foots. Good luck

Or...
Set the boat trailer so the hull is level with the ground.

Set the motor so the prop shaft is also level.

Measure bottom of pad to ground, then center of shaft to ground, difference is your number.

And everything else Gary suggested.

LOL, that's almost exactly what i just told him in a PM. u and i think alot alike Pat!!
course it's easy for me on that boat, as i had one very similar long time ago. 8" plate on a 191 with 200efi, and a 25p tempest (worked) and ran 6200 rpms at 72-74

Go to my website and click on the prop shaft height measurement link. it will walk you through it.

here.. click link below

http://www.stevescustomprops.com/propshaftheight.html

I had three 202's, the finest hull champion ever built. And setup a fleet of them.

That's almost cookie cutter setup, and those speeds are conservative depending on load.

With a rapair box, reeds and an XB tuner, mine ran high 70's loaded with a 27 tempest.