Addition of a drain plug in "84 SN gas tank

The best way to keep water out of your tank is to keep it full. Most manufactures suggest storing you boat with a full tank and a stabilizer. My tank is mostly empty and I will fill it with half Avgas and 1/2 pump from the station for storage.

I think a fuel sump drain on the water seperator is a great idea. I have used them a lot on many small aircraft and commercial jets. The problem I see is that on an aircraft if the drain leaks, it will leak into the open air and won't cause a fume or fire hazard, plus if it is avgas, you most likely will notice the discoloration from the Avgas on the paint. In a boat, a small leak could cause a vapor problem and/or explosion. The only ones I have ever seen leak are the ones that aren't used as often as they should be, so maybe it wouldn't be a problem. If you are buying good gas you shouldn't have a problem. I just replaced my fuel filter and noticed that the bottom of the seperator was a rusty color, but I just purchased this boat, so I have no idea if or when it was last checked or changed. I plan on draining it annually and hope that will be ok.

Can't you just lower the bow, jack up one side of trailer, then put the siphon hose in the low corner of tank?

Seems like drilling a hole in a good gas tank is a extreme action to take for a small problem. How would you weld a fitting in? kaboom?

I don't feel it meets USCG regs. Most will siphon there tanks. Use some Startron or Stabil Marine and you shouldn't have water.

Wecome to CCfan. Have you submitted pictures and some text for the diaries yet? We always like to see members boats in that section. Tell us more about the boat. Is it a "project" boat?

If you want, add your first name to your profile. I don't know how much time you've spent on CCfan but you'll find that most will use first names here rather than screen names which is common on other sites.