Bronze Thru Hull / Plug Bung

[Snekbit]

Hey guys,

Firstly, I have no idea what the official name for this fitting is, I've seen it called numerous things. So I apologize ahead of time.

I have a feeling that it's time to change bilge thru hull on my Mako. Problem is, I can't seem to find instructions on the removal of this kind of fitting. It's basically your standard bronze thru hull, that is flared on the outside of the transom, but on the inside there is nothing. No flare, no threads or nut. Is this thing just being held in with 5200? And is that normal?

[thejeepguy87]

quote:

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Originally posted by Snekbit


Hey guys,

Firstly, I have no idea what the official name for this fitting is, I've seen it called numerous things. So I apologize ahead of time.

I have a feeling that it's time to change bilge thru hull on my Mako. Problem is, I can't seem to find instructions on the removal of this kind of fitting. It's basically your standard bronze thru hull, that is flared on the outside of the transom, but on the inside there is nothing. No flare, no threads or nut. Is this thing just being held in with 5200? And is that normal?

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If you are talking about the garboard drain plug, then they usually have 3 screws that hold it in place on the boat.

[letsfish231]

It kind of sounds like you're talking about the brass sleeve that you put the rubber plug in and twist it to expand the rubber against the sleeve therefore creating a water tight seal for your plug. If this is the case then that sleeve back in the day i believe was forced in there and then flared out on both sides of the transom to keep it in place. Over time usually the flare on one or both sides chips away. If this is what you're talking about then, get a hacksaw blade and stick it inside and cut it, then take a pair of needle nose pliers and grab it and pull it out. Once it's out, clean the hole as good as possible and let it air out. Go buy you a nice garboard drain and install it. I will look and see if I have a picture of mine before and after.

heres an after

[Snekbit]

thejeepguy87, it's not a gardboard. My old boat had a one of those, This doesn't have any screws.

letsfish231, It does look like the sleeve in the upper left portion of that picture. You are correct in saying that it takes a t-handle plug. I appreciate the advice.

[cgmiller]

mine turned out with little effort. put a plug in the hole and twist and pull it out.