TD020 Venturi Vibrates Loose from New CNC Carb Body

Hi all,

I bought my Tee Dee 020 a CNC Aluminium Carb Body to replace the red plastic item which had cracked around the screw thread. My thinking was that this shouldn't break in the same way as the plastic one, and I don't use the pressure system that can be made to work with the plastic carb body anyway so no difference to me in performance.

All was good until I had it running through a full tank and toward the end of the run the carb venturi and needle valve assemble vibrated loose from the new carb body. Luckily this was a bench run or I'd be combing my flying field for years looking for the missing parts.

I used to tighten the venturi into the plastic carburetor body using my fingers and my guess is that the plastic was a tight fit but malleable enough that I could tighten the venturi into it without it coming loose from vibration. With the aluminium CNC item the thread feels good and tight and obviously works but from this latest experience I'm guessing it's not good enough alone.

Two solutions have come to mind, make or find a tool that I can use to tighten the venturi into the carb body, or put a dot of non-permanent thread lock on the threads before putting the assembly back together. I feel that using a tool alone it would only be a matter of time before this happens again so has anyone got any reasons why I should not put a small dot of threadlock onto the threads? Speak now or forever hold your peace. I think that the biggest risk is overdoing it on the threadlock and having some get onto the rotating parts of the engine.

Thanks

I would use threadlocker. Just a small bit, and see how it does after several runs.