thru hull problem... help pls

[ceilidh]

After going through all items listed from the search archives, decided I needed some collective thoughts. Replacing thru hulls on my '80 Typhoon; moved up to 1" bronze with mushroom top. Port side top to thru hull fits "pretty flush" to the hull, a small gap on one side.... stb side, however, is a different matter. When thru hull pushed into the hole (lock nut inside is not tightened) there is a 1/8 - 1/4" gap between top and hull approx 40% of the circumference. I removed the old bottom paint from the "high" side and am now down to gelcoat. Do I need to continue to grind high side until thru hull fits flush or can I let xs bedding material (sikaflex) flow into space as I tighten nut from inside. If I can post a pic, I'll try... any/all comments or suggestions are welcome... thks Hank

[Duncan]

After going through all items listed from the search archives, decided I needed some collective thoughts. Replacing thru hulls on my '80 Typhoon; moved up to 1" bronze with mushroom top. Port side top to thru hull fits "pretty flush" to the hull, a small gap on one side.... stb side, however, is a different matter. When thru hull pushed into the hole (lock nut inside is not tightened) there is a 1/8 - 1/4" gap between top and hull approx 40% of the circumference. I removed the old bottom paint from the "high" side and am now down to gelcoat. Do I need to continue to grind high side until thru hull fits flush or can I let xs bedding material (sikaflex) flow into space as I tighten nut from inside. If I can post a pic, I'll try... any/all comments or suggestions are welcome... thks Hank

How about mixing up a little fairing compound (epoxy + filler) to even out the low side?

I don't think you want to rely on the Sikaflex, because it's rubbery, so you won't get a solid joint.

You mention a lock nut, but nowadays the recommended practice is to use something with a flange (either a flanged adapter or a flanged seacock). That way, you get a much more solid installation.

[img]http://www.jamestowndistributors.com/us ... 6746-1.jpg[/img]

LINK

[ceilidh]

Thks Duncan; I have the epoxy and filler out in the shop... will get out tomorrow to see if I can "build" a bit of a wedge to accommodate the gap. I have colloid filler, that should work ok.... hank