Thru Hull Exhaust
#1
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Join Date: May 2011
Location: Lake Ozark, MO
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Thru Hull Exhaust
Getting ready to cut the holes thru the hull for the exhaust tips. They are 4". How much bigger do I need to make the hole? The outside dia of the tips are 4 1/8". Don't know if I need to go any bigger since it is exhaust. Thanks
#2
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You will want to give yourself a little room just so you can fit it together with no problems and you also need a bit of room for a good sealer so NO water can make it's way to the wood in your transom.
If your OD is definitely 4 1/8" I would go 4 1/4". I am not sure there is a hoel saw you can get between them.
If your OD is definitely 4 1/8" I would go 4 1/4". I am not sure there is a hoel saw you can get between them.
#5
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For a little more assurance of getting water intrusion in your cut out openings, I would wet them out with epoxy first and let it dry than a sealant/silcone after that.
#6
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Definitely treat the exposed wood with resin and I would use 3M 4200 to seal the tips.