I have a 28 foot yacht made of fibreglass and it has an outboard motor. There is no need for anodes. The only metal under the waterline is the sink outlet and the old diesel raw water inlet.
It depends what your Cav32 is made from. Steel boats require anodes, and also if there is a steel prop. Dunno about bronze props. My previous steel yacht used 2 or 3 anodes.

FabulousPhill said..
I have a 28 foot yacht made of fibreglass and it has an outboard motor. There is no need for anodes. The only metal under the waterline is the sink outlet and the old diesel raw water inlet.
It depends what your Cav32 is made from. Steel boats require anodes, and also if there is a steel prop. Dunno about bronze props. My previous steel yacht used 2 or 3 anodes.

Just to clarify Phil ,just about all outboards have anodes somewhere.

Bananabender said..
Just to clarify Phil ,just about all outboards have anodes somewhere.

Sorry BB, I meant the yacht by itself. Since it is f/glass and the shaft has been sealed over, the only metal is the 2 inlet/outlets flanges - quite minor or made of bronze.
The OB is a different issue and has its own anode. Without a diesel engine, shaft and big propeller, my yacht is simpler.

It's all too easy to have two many anodes. The only time you will have mixed metals in close proximity in this yacht is when the paint wears off the propeller.