Welch plugs

[txmowman]

Proper welch plug replacement does not flatten the dome but rather is peened around the edge. Harbor Freight sells a leather punch set. Get one of these for less than $10. There is one that fits the larger welch plug perfectly. Grind the sharp edge off of the punch, install the welch plug and give it a gentle but firm wrap with a small hammer and you’re done.

 

[StarTech]

Proper welch plug replacement does not flatten the dome but rather is peened around the edge. Harbor Freight sells a leather punch set. Get one of these for less than $10. There is one that fits the larger welch plug perfectly. Grind the sharp edge off of the punch, install the welch plug and give it a gentle but firm wrap with a small hammer and you’re done.

That is the very reason the Kawasaki Nikki twin barrel carbs are losing their welch plugs. They are just peened around the edges then they are easily getting loose and falling out.

Personally I don't like having to replacing $6 welch plugs because of this. Sometimes I get lucky and they fall out while cleaning the carbs.

 

[hlw49]

I like to put fingernail polish over it

 

[StarTech]

And I have seen jets to clogged with whatever OEMs used to seal them if used internally; especially 2 cycle cube carbs.

 

[hlw49]

And I have seen jets to clogged with whatever OEMs used to seal them if used internally; especially 2 cycle cube carbs.

notice I said over it

 

[StarTech]

Apparently you have never worked on a 2 cycle cube. Some OEMs will use sealant on the welch plugs inside the metering chamber which over time flakes off and clog jets and check valves. This why I have to look over the cubes with a loupe to see if this stuff is clogging things.

Outside the fuel system is fine but not inside the fuel system.

 

[Tiger Small Engine]

I like to put fingernail polish over it

Very rarely do Welch plugs fall out. Replace, slightly peen, and hit it with fingernail polish and you are set.