Rate of anode corrosion

[Tranona]

I have heard that an isolator will not be much use on a plastic boat. They work better on a steel hull. Any thoughts?

The hull material is largely irrelevant. The purpose of the isolator is to block stray currents when you are hooked up to the mains - even if you are not drawing mains current.

In fresh water, magnesium anodes are recommended or aluminium if you are in brackish water or alternate between fresh and salt water.

Suggest you goto www.mgduff.co.uk to get up to speed on the subject before you take any action.

 

[MapisM]

He said he wanted the anodes to last longer, nowt about his engines or boat.