Join Date: Apr 2006
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Re: Should there be a washer on the outboard engine oil drain plug?
Drain plug washers seem to be the children of some random engineering god. Onceuponatime we all managed to live without them. Smooth metal bore on smooth metal, end of story. Now everyone seems to want to SELL expensive replacements but, wtf, it is only a gasket or a crush washer, however you want to look at it. Nylon, neoprene, cork, soft metal...I'd go to the local NAPA store with the drain plug and ask 'em for a couple of drain plug washers that fit around it. Being a boat, maybe nix the aluminum and copper and find a synthetic.
Definitely NOT a ten dollar part, no matter what it is protecting.