I have a 1989 Thundrcraft Magnum 220 with a 4.3 Mercruiser Alpha 1 drive.
It is a heavy boat at 4000 LBs
When I purchased the boat it had a 14 D 19 P 3 blade Piranha (replaceable blade)prop.
The boat never achieved WOT with that prop. and with a load would not even plane.
I changed to the spare prop that came with the vessel which was a 14 D 14 P.
It now rides and handles much better and cruises at a speed of about 25 MPH. at about 3200 RPM
When I research all that I could most recommendations come back at a 19 P. prop
Is a 14 P prop seriously under propped for that boat motor & O/D?
The motor is solid, starts good and runs good except when approaching WOT.
When hitting about 3500 RPM it seems to lag and almost seems to stall.
I have never pushed it above that point.
Just wanting some "reasonable" feedback from those in the know.
It is a heavy boat at 4000 LBs
When I purchased the boat it had a 14 D 19 P 3 blade Piranha (replaceable blade)prop.
The boat never achieved WOT with that prop. and with a load would not even plane.
I changed to the spare prop that came with the vessel which was a 14 D 14 P.
It now rides and handles much better and cruises at a speed of about 25 MPH. at about 3200 RPM
When I research all that I could most recommendations come back at a 19 P. prop
Is a 14 P prop seriously under propped for that boat motor & O/D?
The motor is solid, starts good and runs good except when approaching WOT.
When hitting about 3500 RPM it seems to lag and almost seems to stall.
I have never pushed it above that point.
Just wanting some "reasonable" feedback from those in the know.