Fuel cap replacements?

[LCA078]

I need a new fuel cap for my M923. The little pot metal fillers in the four holes corroded to the point where they started leaking and falling out. The only reason I can think why they exist is that they would melt during a fire and allow pressure to escape the fuel tank so it doesn't explode but either way I need to fix it. My first reaction was just to seal up the holes with JB weld or something similar but the threads on my fuel cap are buggered up a bit so I'm looking for a replacement. I thought I read somewhere here there are plastic fuel caps that are pretty good but the search function doesn't like searching for 'cap' (too short a word). I didn't see anything in Wes's parts list but I'm sure someone knows an interchange number. Thinking about locking versions or versions that are easy to screw on/off by hand. I can quickly find original brass caps for $50-60 but what other options exists for replacement fuel caps?

 

[Mullaney]

I need a new fuel cap for my M923. The little pot metal fillers in the four holes corroded to the point where they started leaking and falling out. The only reason I can think why they exist is that they would melt during a fire and allow pressure to escape the fuel tank so it doesn't explode but either way I need to fix it. My first reaction was just to seal up the holes with JB weld or something similar but the threads on my fuel cap are buggered up a bit so I'm looking for a replacement. I thought I read somewhere here there are plastic fuel caps that are pretty good but the search function doesn't like searching for 'cap' (too short a word). I didn't see anything in Wes's parts list but I'm sure someone knows an interchange number. Thinking about locking versions or versions that are easy to screw on/off by hand. I can quickly find original brass caps for $50-60 but what other options exists for replacement fuel caps?

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My opinion is that a regular fuel cap is the way to go.
You can always use a little RTV on the inside of your new cap to keep the 4 holes in the top from corroding away over time.

 

[LCA078]

My opinion is that a regular fuel cap is the way to go.

I hear ya but my cap is pretty hard to put on or take off. I even removed the screen section and it's still a bugger. When I tighten by hand, I'm pretty sure I'm not even bottoming out on the rubber gasket. Using a large set of pliers gets me another turn or two but I still don't think it's sealing. Not sure if it's because the original fuel caps are just that tight or if mine is just that screwed up.

 

[Mullaney]

I hear ya but my cap is pretty hard to put on or take off. I even removed the screen section and it's still a bugger. When I tighten by hand, I'm pretty sure I'm not even bottoming out on the rubber gasket. Using a large set of pliers gets me another turn or two but I still don't think it's sealing. Not sure if it's because the original fuel caps are just that tight or if mine is just that screwed up.

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I am thinking your cap may well be "screwed".
How do the threads on the tank look?