Discussions (1313)

Anodes

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Skykomish E29 says:

Hi guys, probably one for Neil.
I was giving some thought to the need for anodes on my boat. (there are none as such only one fitted to the water cooling on the engine).
I do not use shore power and was told if I don't use this I really didn't need to worry.
There is very little room to fit anything to the prop shaft as she is a long keeler with rudder attached aft of the keel (like a Twister).
I probably don't need to worry as the boat was built in 1964 and has never had external anodes fitted, it was just after reading an old magazine I the fears of corroding propshaft and prop crept into the mind and started niggling away.

One thing that I did notice was that the bolts holding the exhaust outlet to the heatexchanger have had a nasty effect on the casting (aluminium) and will at some stage need re threading. (This is a Beta engine which was new about 4 years ago) Certainly one of the bolts has seized to the exchanger housing and will need some persuasion to remove, the head already having broken off.

Any thoughts guys.
4:28AM, 14 November 2010 PDT (permalink)

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songeur2010 says:

My keel has all kinds of of deep corrosion, probably due to fact that the zinc anode had completely gone. Songeur had a small one on the prop shaft which had partly corroded away, I will definitely be putting one back on the keel and the prop shaft, much better safe than sorry.
108 months ago (permalink)

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Skykomish E29 says:

Fortunately I have an encapsulated keel so that bit is not a problem. My main worry is the propshaft and prop. Have to say Aeolus didn't have an anode on the keel just the outboard, and whereas each time she was hauled out there was superficial surface rust, there was no real serious corrosion
108 months ago (permalink)

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Andrew Curry says:

Take a look at the attached link. Page 14 shows were the anode is on the beta heat exchanger. www.bluemoment.com/manuals/BZ482_manual.pdf
From what ive been told they will eat one of these in a season.

To protect your shaft and prop you could use one of these www.asap-supplies.com/marine/electro-eliminators
to run on the shaft and attach it to a hanging anode
Originally posted 108 months ago. (permalink)
Andrew Curry edited this topic 108 months ago.

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Skykomish E29 says:

Yes I can believe that Andrew, I have several Anodes that came with the boat from the Beta Engine and there isn't much left of any of them!

Thanks for the info
108 months ago (permalink)

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Andrew Curry says:

The Beta is a great engine. It would be my choice if i had a boat with a inboard.
108 months ago (permalink)

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sailing bye1 says:

I have 2 fitted on my Yanmar inboard as well as the prop shaft and hull. I only found the 2 on the engine this spring after noticing a build up of a white powder where the 4 bolts hold down a small cover over the anode at the rear of the engine.
108 months ago (permalink)

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Snoopy463 says:

Better check my Beta engine this year then! THe anode on Snoopys prop shaft has been changed every year since the engine was installed but not looked at that one for a while.
108 months ago (permalink)

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rothwell_neil says:

So long as the anode is electrically connected to the item you want to protect you will be fine as the conductivity of the seawater means you get a full circuit.
108 months ago (permalink)

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