Last winter the steel gas tank on my 1250 started to leak. On the bottom of the tank where the sediment bowl attaches, there is a NPT fitting on the tank. The fitting appears to be part of a small round plate that was brazed to the tank. It seems to be leaking from where that plate is brazed onto the tank. There are no rust there so that's all it could be. I picked up some "quick steel" fuel tank repair stuff from the local parts store. It was more of a paste than an epoxy but it seemed to do the trick. Once it set up I sanded it smooth and repainted the area. No more leaks.
A couple weeks ago I started to smell fuel again around the tractor. Sure enough the bottom of the tank, right around that plate/npt fitting is damp with fuel again. Nothing is dripping on the ground, but it is damp and stinks up the garage. I haven't removed the tank yet, just drained it, but I'm guessing that repair stuff hasn't held up.
Have any of you been successful in repairing a leak like this? I suppose a new plate and fitting could be welded (carefully obviously) to the tank. I've been hesitant to try the sealer that goes in the tank. The stuff can come loose if it didn't adhere properly and I don't want that stuff getting into my carb.
There are a couple plastic tanks on ePay as well as an alternative I suppose.
Any advice is welcome.