I don't think LocTite will survive constant submersion in gasoline. Either the threads of the jet or the metering fixture are worn, or the jet needs to be tightened a bit more firmly. That assembly will stand a pretty firm torque without getting damaged- - - -just be sure your screwdriver is a really good fit in the slot of the jet.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!