Recently bought a new set of Bravo props, have put only about 15 hours of run time with probably 30 hours of total time in salt water since install. Props and drive shower tubing has the same crust as in this pic. Any thoughts on what could be causing this?

Thanks,
Rick

Try lime away or CRC. Then rinse good. Works great for the high calcium and alkiline water at Lake Havasu.


dave

It's just mineral deposits. Spray it with some CLR, Lime Away, or Sno bowl toilet cleaner and rinse well.

yea...the salt water, rinse well with fresh water after every use

Do you have any zincs on there?

that isn't really 'salt' it is from 'hot' water. i.e., water with electrical current in it. Wherever you dock your boat is screwed up, which is pretty common on canals and older marinas.

I see you're in Palm Harbor so we pretty much boat in the same waters. I don't have anything like that visible on my gear ever. I'm going with Vette's theory of stray current. It looks like electrolysis deposition.

Make sure you have an Anode on your drive.

If the boat ever stays in "Home Port" I heard thery are bad for current in the water....

Stray currents usually burn propellers removing material. However, deposits can form pre burning. Deposits can appear from high mineral contents or from cavitation. If the problem turns into porosity, there may be a shore power issue. If the porosity only occurs on the prop, it is most likely cav. burn. There are units called galvonic isolators that redirect the current to ground and save props, lower units etc. if there is stray voltage at your dock.

Brett