Good Catch Angus99! I did try to split the original valve laterally, and did with the Fein but still no luck. I was going to drive a short piece of round wood dowel rod into the thru hull and use this to center a hole saw which would have worked well as was suggested. The dowel size I grabbed was too small so I took plan B (kulas44) and used a 4" side grinder to grind the mushroom head off, which also heated the old glue. Came off like a champ!
1983 Present 42 Sundeck
Twin Lehman 135's
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Steve Point Cadet/ Biloxi, Mississippi USA
*Present 42 twin 135 Lehmans
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