98 Convincor 253 75.3 26 Hydromotive 69 with 26 bravo
Changed Carb to 850cfm AED last Sunday ran 73.4 gps at 5250
and still pulling hard with 24 hydro.I hope try a 26 hydro this weekend!:)

1990 281 Twin 2.5's on custom bracket 68 gps still looking for the right setup hight ,props, turning in/out, more setback
Mike

thanks gameover i'll call hydromotive today, i talked to them a while ago and todd overthere suggested a 4blade 15x27p lab finished prop. Just needed more info from check owners.Not many of these great boats here..toooooo many baja's!!!!

guys, i have a 1997 253 with a 525sc, a hydromotive quad 4
did not work on my boat.rpms were there but the boat was
sluggish all the way up the rpm range.ran exactly the same as my bravo one 4 blade on the top,why run the same mph but take a lot longer to get there,tried 2 different sizes,took them off and sold them.just my .02.------joe

Joe, what kind of prop are you spinning now?

prop
 

hirschy; their is no way you can pull a 27 pitch 4 blade! unless you have 550 hp or better! talk to tom at hydromotive, he made me a 25 pitch 4 blade! i turn it 5300 rpms with a 500hp efi motor.i have the same hull as you> BILL

thanks bill, i'll talk with tom soon, we came to the conclusion a 27 4 blade labbed would get me to 5150 rpm which is the ideal rpm for my 500hp, obviously i need some more info.My boat is with my mechanic to do some warranty work , looking at installing whipple sc says he'll give me a great deal. anyone install whipple? How much should i expect to pay including new carb and installed? hirschy

Gameover-running a stock 26" bravo 1 4 blade-
solid hub-also tried a Spinnelli ,too much vibration,
broke a blade on the spinnelli,porosity in the weld,
mirage plus does not like trim on my boat,tried 6 props
over 2 years,mercruiser bravo 1 works on my boat-----joe

Really, a Bravo1? Haven't had any qualms with the hydo prop but I might just try to test a bravo.

hirshy; call knuckle marine about superchargeing,they quoted me 7300 to pro- charge my 500hpefi motor.the whipple is a little more, not sure how much more!they do a lot of performance stuff on checkmates and other models.here is their web site address kunkels marine.com they have a excellent repatation. bill:) :)