Tartan 27' owner
Join Date: Jan 2008
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Re: White powder around stuffing box.
I think Weinie is thinking electrolysis, like you get powder buildup sometimes on your battery terminals on a car.
I'd guess that salt is fairly likely, unless your boat is in the Great Lakes.
With the fancy Gore GFO and GTU packings I've noticed a dark gray liquid spinning off my shaft right at the stuffing box where the drip comes out. What is a little weird is that your ring of white powder is between the stuffing box and shaft log hose and not where the shaft enters the stuffing box. Where your white ring is there should be no water getting out from the two hose clamps.
I'm going to guess that your white ring is some compound that was applied (long ago) which has now turned into a powder. Perhaps a white lithium grease? used to make it easier to fit the hose over the stuffing box hose barb.
If this is the case then I don't think it is anything to worry about.
"The cure for anything is salt water~ sweat, tears, or the sea." ~Isak Denesen
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