Hello all
New to boating so be aware very inexperienced. I just picked up 1999 h180 four winns with Volvo 3.0 i/o. it has a 14-1/2"x21 prop which max rpm is 4600 and speed is 36mph. I changed to extra boat prop 14-1/2x19 prop and rpmwent to 4800 and lost speed to about 32mph. I have trimmed up...