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Hookmaster

Stainless Steel Lower Unit Plugs

Question

Hookmaster

I saw some replacement stainless steel lower unit plugs that have an Allen wrench head instead of a slotted screw driver head. Is there any risk of galvanic corrosion with these?

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Whoaru99

Guess I've never checked to be sure, but the lower unit plugs on my 1996 Merc 90hp appear to be stainless steel from the factory. The lower unit and the plugs seem not corroded in any way that I can tell.

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iffy

Lower unit plugs are always stainless steel. There is no corrosion with stainless and aluminum.

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