Anode

About Time

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I have a Yamaha Waverunner which I use in brakish/ salt water. After each use I flush but I wonder why no catodic system is fitted to these toys....(aluminium anode). I should think it was easy to ground the engine with an aluminium anode in the rear... any suggestions and/or calculation as to the size of an anode ? Some may say it is not needed as the Waverunner comes out of the water after each use but I should still believe it will be better than nothing. Any comments guys.
 
I've got a small Fletcher speedboat with a Mercury outboard. I've had it (and used it in the sea) for over 20yrs. The outboard has a couple of anodes on it as standard. They've never been changed and the both look pretty much as new.

As said above; unless you are going to leave it in the water - don't bother.
 
I have a Yamaha Waverunner which I use in brakish/ salt water. After each use I flush but I wonder why no catodic system is fitted to these toys....(aluminium anode). I should think it was easy to ground the engine with an aluminium anode in the rear... any suggestions and/or calculation as to the size of an anode ? Some may say it is not needed as the Waverunner comes out of the water after each use but I should still believe it will be better than nothing. Any comments guys.

You don't give any details year ? model ? but some certainly have an anode in the engine.
 
God...
You know it's a question I often ask of myself....
I have a boat in fresh water most of the time (and have had jet ski's, cruisers, speedboats etc), I have put aluminium anodes on them. Aluminium anodes are supposed to be suitable for brackish waters or a mix between salt and fresh.
Zinc is supposed to do salt and magnesium is supposed to do fresh.
Now..:having had aluminium (stated as doing both) on for many years, I can report that the anodes seem to corrode very little. This concerns me. I think I would rather just go for magnesium in fresh water...or zinc in sea water. Failing all this and if you are like me, when the boat is mainly in FW or seldom in SW...I would go for magnesium...being the weaker metal on the galvanic scale, you will be safe with this no matter what....until it's corroded completely of course.
 
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