Hi everybody...I'm a newbie and been bitten by the boat bug!! Question.. I have a 1991 21' open bow with a mercruiser 350 magnum & a alpha one drive engine serial # OD 425381 Drive # OD 567128 and the serial # listed on the alpha 1 is OD 465908 on the motor sticker it sez WOT max 4200-4600 rpms.
The boat does 57mph at 4000 rpm's if i trim the boat to higher rpm's it just doesn't sound right..the above #'s the boat seems to run best. I can't find a pitch # on the prop but its a 3 blade s.s. and it sez hill propellers it measures 14" in dia. HELP..what should the prop be... 3 blade....4 blade...s.s....what pitch for top end....or hole shot for skiing..... Thanks in advance for all the help you can give me.
The boat does 57mph at 4000 rpm's if i trim the boat to higher rpm's it just doesn't sound right..the above #'s the boat seems to run best. I can't find a pitch # on the prop but its a 3 blade s.s. and it sez hill propellers it measures 14" in dia. HELP..what should the prop be... 3 blade....4 blade...s.s....what pitch for top end....or hole shot for skiing..... Thanks in advance for all the help you can give me.