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Posted by wayne mak on April 6, 2006, 8:10 am
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I once drilled a hole in the center of the upper drain/fill plug and fitted
a small hose to it, I then was able to put a sight/fill cup in the boat
above the gearcase height, worked for me this was on a Mercury I/O. The
stainless fill plug has a nylon washer so there is no contact with the AL on
the water side of things, just the oil side.
>I would like to tap a barbed fitting into the aluminum gearcase of my
>outboard motor. I cannot find stainless barbed fittings and I assume brass
>and aluminum touching under salt water is a no- no. If I tap the aluminum
>to take a stainless 1/4" bushing and then thread in a 1/8" barbed brass
>fitting will there still be corrosion problems. There are several zinc
>anodes on the motor and aluminum hull.
>
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>outboard motor. I cannot find stainless barbed fittings and I assume brass
>and aluminum touching under salt water is a no- no. If I tap the aluminum
>to take a stainless 1/4" bushing and then thread in a 1/8" barbed brass
>fitting will there still be corrosion problems. There are several zinc
>anodes on the motor and aluminum hull.
>