adornato
Senior Member
- Joined
- Oct 10, 2007
- Messages
- 121
- Location
- USA
- Vessel Name
- Sarah McLean
- Vessel Make
- Mainship 30 Pilot
Spent nice day yesterday crabbing outside the Golden Gate in 70 degree weather and 5kts of breeze. The only annoying thing is the cavitation noise coming from the rear of my 2002 Mainship 30.
It depends on the water and the engine speed. It was very loud in the turbulent flood eddy mix under the bridge at 2800 rpm but got a lot quieter when moved into smoother water near Sausalito
and gets less at full WOT. Very distinct sound from engine noise. More of a rumble
The question is: could moving from a 4 bladed prop to a 5 bladed help significantly? Or maybe just re pitch the prop.. My WOT runs to 3250 at 20 kts which is just where a Yanmar 4LHA-STP should be at WOT.
It depends on the water and the engine speed. It was very loud in the turbulent flood eddy mix under the bridge at 2800 rpm but got a lot quieter when moved into smoother water near Sausalito
and gets less at full WOT. Very distinct sound from engine noise. More of a rumble
The question is: could moving from a 4 bladed prop to a 5 bladed help significantly? Or maybe just re pitch the prop.. My WOT runs to 3250 at 20 kts which is just where a Yanmar 4LHA-STP should be at WOT.