Nikki Carb welch plug issue.

[PTmowerMech]

I can post engine & carb numbers if I need to. But this carb, the Nikki's with the spiderwed gasket, I removed the outside welch plug. But the kit's replacement, is .36. The hole for it is .35. Shouldn't the plug be .34, giving it a little room to go in then spread out?

What am I missing here? I'm putting the dome side out, so it'll spread out.

 

[Hammermechanicman]

Plug is just slightly oversized to be a press fit. I like to put a small dab of 3 bond on it when i press welch plugs in. I don't hammer them i use my drill press. I chuck the appropriate size drill in backwards and use it to press the plug in.

 

[PTmowerMech]

Plug is just slightly oversized to be a press fit. I like to put a small dab of 3 bond on it when i press welch plugs in. I don't hammer them i use my drill press. I chuck the appropriate size drill in backwards and use it to press the plug in.

I don't have any of those space shuttle special fit aerodynamic tools. So I tried using a socket that was just a little smaller. Some of the plug went in. But one side didn't. I have one plug left.


On a side note: I had a spare carb already cleaned, so I just rebuilt that one. And it works fine, except for when I choke it, it doesn't act choked. But that's for a different thread.

I can see why there's not much talk of welch plugs. From now on, I'll avoid them like the plague. (or corona virus)

 

[Hammermechanicman]

A good ultrasonic cleaner is your friend.

 

[PTmowerMech]

A good ultrasonic cleaner is your friend.

I got one and I love it.
But it doesn't make coffee or install welch plugs. LOL..

 

[bertsmobile1]

It is very rare that you need to remove a welch plug from these carbs, or any carb for that matter.
Probably do it 1 or 2 times a sesaon & then only on a carb from an engine that has been laid up for a long time so are very very gumed up.
OTOH when I did, the aftermarket kits I used were wrong & had to get sent back to the wholesaler they replaced them with original ones at no extra cost with the rep admitting that they had bough in a bad batch.
Good news was they sent them to a disabled workshop to be converted to a gasket ( well O ring ) only kit which was good & I bought 20 of them .
Also note there are 2 variations ( at least ) of this carb with 2 different white jet plates & subsequently 2 different gasket sets.
Don't know if the welch plugs are different .

 

[Hammermechanicman]

I got one and I love it.
But it doesn't make coffee or install welch plugs. LOL..

You got the wrong one. Mine makes coffee and cappuccino.

 

[PTmowerMech]

You got the wrong one. Mine makes coffee and cappuccino.

Now that's a USC.

Mine just makes clean carburetors.

I can see why the plug doesn't need to be smaller than the hole, otherwise, unless the hole was tapered, it would just fall to the bottom. Maybe I didn't get it centered before I started trying to push it in. A little lube might do the trick.