Hello Everyone, Just bolted in a 525 sci carberated into a 96 , 27 donzi and trying to see how big of a prop a can spin. Currantly the boat ran a 502 mpi with a 23 mirage . Tried a 25 four blade only to lose speed but great out of the hole ( not sure what make it was ) anyone have any ideas would be really helpful....

wt rpm were they runnig?????

5,200 rpm, i was experiancing some cavatation out of the hole .

i would try a 25mirage plus prop