Re: fuel inlet filtting

Posted by Fish'n Jim On 2018/7/16 8:13:17

There's no thread sealer on the filter side so it's safe to assume none was used on carb side.
I'd disassemble the carb side and inspect to make sure there's no cracks or lost threads. Looks like a screen filter cap behind so you can see from both sides. If it's cut a face groove, if threads OK, I'd file off the face flat again. From the grooves on the brass, looks like a pair of channellocks or small pipe wrench was used, and over tightened.
I'd definitely get a new fitting, and don't spin on from one side. Tighten each side independently. Use a short flat wrench. Tightening the filter into position probably lead to over tightening the carb side. A union is best for this.
If the threads are messed up, this is probably cast aluminum and part would have to be replaced. A skilled TIG welder maybe able to fill so it can be retapped but would ruin the finish. There's some commercial type epoxy metal fillers but I don't recommend that approach long term. They're for emergency repairs.
Since dissimilar metals, use a thread sealer. I'd use a non-teflon thread sealer, aka "pipe dope". Teflon seems to work itself loose in vibrating services and tape extrudes out during tightening tapered threads so there's not much between the threads. Tape bits also seem to end up plugging carbs.
Make sure you don't over apply sealer, and wipe up the excess.
I'd stay away from brass pipe(nipples), as they can crack tightening with pipe wrench. The jaws dig in deep on soft material. Hand tighten or use soft jaw if U must.
Always check threads with a thread gauge.
Brass fittings are a pain any more as they've changed to lead "free", and they're just not the same and difficult to find some of the old configurations.
ps: I doubt, as most SAE gas line was tapered or flared, but there's a small chance the carb side had a special flare fitting with straight threads and someone jammed wrong fitting on. That would take some research and more info.
It'll be obvious on inspection. Always check threads with a thread gauge.