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Beta Marine Repower Solutions -> Beta Marine Engines -> Corrosion around anode cap on Beta 38
Post Info TOPIC: Corrosion around anode cap on Beta 38
Blue Moon


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Corrosion around anode cap on Beta 38
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In replacing the heat exchanger anode for the first time last month on my one-season-old Beta 38, I noticed what appears to be some corrosion around the anode cap, apparently due to some slight weeping. The cap was quite tightly snugged down and there has never been any dripping or other obvious evidence of leakage, but the attached picture shows that some moisture must have escaped.

There was no fiber washer, o-ring, or other seal on either the original or replacement part (from Beta Marine); should there be? Or, should Tef Gel or another substance be used on the threads?



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my1972ih


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good picture. there will be no gasket. Be sure to use the Beta caps because they are a different thread than US pipe thread. You could use a CONDUCTING grease when installing the newo one if you chose, but the cap ahouls seal if fully tightened unless it or the heat exchanger have damaged threads.

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my1972ih
Blue Moon


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This was the original factory anode and cap and I think it was well tightened because it took some force to remove. But, once loosened, removal and then reinstallation of the new one were easy, so no sense that the threads have any problem. So why would the original factory piece have any leakage?



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Farron


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Hello Blue Moon.

What you see near the threads is not corrosion. It is a small bit of pipe thread sealant that is originally installed at the factory and was painted over with the red engine paint.

The cap and the anode plug are both made out of bronze and will not corrode in salt water and will not galvanically react with one another.  If you see leakage at the plug, tighten the plug a bit more or use a small bit of pipe thread sealant. Never teflon tape.



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Best regards,

Farron

Technical Sales and Service for Beta Marine, US Ltd. Minnesott Beach, NC   PH: 252-249-2473  farron@betamarineusa.com
NeilMcCubbin


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Why not tape? We use it and notice that there are always visible holes in it allowing metal to metal contact. We measure zero ohms between the cap and the block

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