[trpntj]

Uhehner - 12/12/2012 8:07 PM

If you have holes in your props (I assume they are aluminum) you have a serious electrical leakage problem. Putting on stainless props will not solve that problem. It's time to consult a marine electric expert. Props are sized by diameter and pitch and need to be sized to your boat and engine so you run at the proper RPM. Talk to a propeller expert. It's too expensive to guess wrong. Capt. George

While a bonding issue is a possibility, I would look more into cavitation burn/erosion, especially with a duo-prop and possible mis-matched props. It happens a lot at the root of the blades, but could happen anywhere over the entire surface or edges.

heres one pic I found of a duo prop case. See the discoloration then the pitting.