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Gasket to seal engine cover

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Almostnormal

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1988 Farallon Whaleback inboard. I need to find waterproof 1" wide self adheasive on one side expandable sealing tape to seal the SS flanges covering the motor cover. The cover weighs about 70 lbs. The gap varies as the floor falls away like 3/8" to zero. Any ideas, products or manufactures? See pics...


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For the tape, I'd go to 3M...there tech support group is excellent.

FWIW, and I'd ask the 3M rep too - you might have to "shim" the floor to get a more uniform gap before the tape will span the gap...if necessary, I'd use some epoxy with a reinforcing filler and let gravity give you a uniform plane to seal against.
 
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