You will get galvanic corrosion if you don't cap that transom... but don't take my word for it, just leave it like that and watch.
Where? I don't understand?
I'm not sure I should tell you why and where when you've already ignored the people that have already recommended capping your transom... you'll just ignore me too.
Some people just have to find out the hard way, and I think you're one of them. The people that suggested you cap your transom knew what they were talking about, and you're too inexperienced to realize that.
If you cap your transom I'll show you why and where after you've capped it.
...btw, you should lose the double nuts on your motor mount bolts and replace them with stainless steel nyloc nuts instead.... or you can ignore that too.
Reagrding the bolts, the stainless steel nyloc nuts I bought and used ruined the threads on the bolt!
That does not sound good at all. You need to replace the damaged bolt(s) before you lose that motor in the lake!
I'm sorry, I already said that I was already going to seal up the seem where the wood extends up with butyl rubber?
Whitehead Industrial Hardware - Gutter & Flashing Sealant Butyl Rubber White Paintable 10.1 Oz
I can't do it right now because i don't have a trailer. I need to sell a few things and then I can buy a trailer.
The fiberglass was for sealing the upper part of the wood (already sealed with minwax) and to protect from physical abuse and bumping into it.
Reagrding the bolts, the stainless steel nyloc nuts I bought and used ruined the threads on the bolt!
The gutter and flashing sealant will work!... for about 15 minutes.
You bought the wrong thread size on the nyloc nuts and that's why it chewed the thread on your bolts.
Double nutting isn't dependable, but don't take my word for it... you'll see.
GEEZ, I never said I was done with the boat!
I think it's 'designed' to use a SOLID screw in drain plug, that once underway, you remove it, and it auto bails.. That's what the 'C-collar' is for....
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There probably isn't enough thickness to the thru hole to properly seal a rubber compression style T or Snap style drain plug like these:
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And your's looks like it's more of a garboard style drain:
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Does that look/sound about right?
+1. The drain you're showing is called a "scupper valve". I have one just like it on my boat. It designed to be plugged from the inside most of the time. However, you can remove the plug once you get up to speed and water will drain out of the back. It works well, just be sure to replace the plug when you slow down! To be honest, I just keep mine plugged all the time when I'm on the water. I use the style of plug in the second pic above and it works great and you can get them anywhere for about $5.
So what's supposed to go in that style of drain plug? The 3/4 drain plug leaks still! I don't understand D: I want something I can remove easily. I don't think the garboard style would even work because it would leak around the threads.
Jig: The design of that plug, kind of makes it a transom mount, and it screws in from the outside, correct?
Are we talkin' thru the bottom of the hull here?
I'm using a 3/4 PVC drain plugs with 2 o-rings but it still leaks D: I measured the hole and it came out to .950 something. Would a 1 inch snap in drain work even though there are threads on the things? The threads are about gone D: