Optimax 115 fuel body drain plugs FROZEN & worse - help!

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Apr 17, 2019
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photostudio_1564993432534.jpg The little brass Allen-head fuel-water drain screws in the bottom of the fuel body of my 2009 Mercury 115 Optimax are screwed, but not in the intended way. They must not have ever been out, as they are both frozen tight. One even has the broken off end of an Allen wrench stuck tightly IN the head of the drain screw (by previous owner or erstwhile 'tech' somewhere). The other screw stripped out before it would budge. Anybody ever have this issue? What was the resolution?

See attached pic for location of drain screws I'm talking about
 
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