50esl74m High speed jet/orifice plug

[Keyboardman]

I'm rebuilding the carbs on my old 50hp Johnson and have removed the high speed jets. They look clean but I am wondering if they can get worn out and need replacing? It says 58 on them and I was also wondering if that is the same as a #58 drill bit. If so, should I get one and see if it's worn? Thanks

 

[flyingscott]

They generally do not wear out and I would not shove a drill bit through them just make sure they are clean.

 

[F_R]

They don't wear out. But they sure do get damaged by people jamming wires, drills, torch cleaner tips, whatever, through them to "clean" them. And/or by people drilling them out for whatever reason. The number is the size in thousandth's of an inch. #58 is .058". But that isn't the whole story. The shape or profile of the orifice sometimes differs. You may think that it is a precision hole, not to be messed with. If that is what you think, you are correct.

 

[Keyboardman]

Thanks guys, I'm not going to mess with them just reinstall.