In the rebuild of a Tecumseh diaphragm carb I see that the kit contains 2 welch plugs of the size that fit the chambers for the High and Slow speed needles.

However; this carburetor had only one of the chambers plugged; the other was open.

The diagram for the carb seems to show only one welch plug used.

Should I install a welch plug in both openings? See picture and diagram....

Thank You for your time!

So; what do you mean? New one to see the one cavity open...or New One to hear of someone closing it with a plug?

Chuck

If you have this carb since new, you would find the plug in the bottom cover after it fell out. Why are you rebuilding it? and how well did it run before you pulled the cover?

The entire machine (chipper) was given to me in pieces. I re-worked the ignition and found that the carb was plugged; the diaphragm toasty.

I put a new needle and seat in; along with the diaphragm and got it running...but certainly not well.

I did more reading and pulled it apart again. That's when I noticed the missing plug.

I'm beginning to think that it does not use a plug there in this application; primarily becausse it did not initially have one...and because the diagram of the carb looks to show only one.

I just found this cut-away diagram this morning. Look at it; it seems to show only one plug with the other cavity opening to the fuel side of the diaphragm.

It also shows a ball valve up under the existing welch plug. I think I'll pull it apart again and remove that plug and try cleaning the ball valve. Maybe that's the problem....

I was hoping that someone on here really knows this carburetor. We'll see.

Comments anyone?

Here's the cut-away:

Sometimes I cheat with plain carb cleaner in a spray can, but most often it doesn't work well on varnished carbs.