MD starting carb questions

jfrankhash · Oct 8, 2011

The parts book shows a drain (58 858 DX)and a plug (primer connection plug 61 338 D) coming from the rear of the starting carb bowl. The carb that was on my 52 MD (FDBK 285523 MD) had these two connected with a small copper tube. The two spare carbs I have have both holes plugged.
Can anyone tell me the purpose of this drain, and why it would have been altered?
Have had starting problems for years and am rebuilding the carb. THANKS, John

MarkinMo2 · Oct 8, 2011

I know oem has a few parts for the M Diesels, but was wondering where you get any of your other parts? Or are you just cleaning up the rest, Thanks, PS wish I could help with your ?

sflem849 · Oct 8, 2011

(quoted from post at 13:04:36 10/08/11) I know oem has a few parts for the M Diesels, but was wondering where you get any of your other parts? Or are you just cleaning up the rest, Thanks, PS wish I could help with your ?

You can't get all of the parts for these carbs. They are REALLY simple so there isn't much to just cleaning them up and putting them together. You should be happy they have what they do. When I was working on my MD carb 5ish years ago you couldn't get anything!

BTW, Steiner's has all the stuff OEM does for half the price. If I had to guess OEM buys it from them, marks it up, and sells it.

sflem849 · Oct 8, 2011

(quoted from post at 11:32:47 10/08/11) The parts book shows a drain (58 858 DX)and a plug (primer connection plug 61 338 D) coming from the rear of the starting carb bowl. The carb that was on my 52 MD (FDBK 285523 MD) had these two connected with a small copper tube. The two spare carbs I have have both holes plugged.
Can anyone tell me the purpose of this drain, and why it would have been altered?
Have had starting problems for years and am rebuilding the carb. THANKS, John

Did you check your butterfly valves in the intake manifold? I have heard of many problems with them causing hard to start issues.

Both of mine have a wing nut type drain on the bottom of the carb. I suppose it is there so you can drain the carb for winter or things like that. I just run StaBil in it now.

pete 23 · Oct 8, 2011

The connecting of those two ports with the copper line was an idea some one came up with to make them start better. The tube used was actually the original drip tube. Some other changes were made internally also to go along with this set up. I believe we drilled a hole in the well tube. I did a few of them about 50 years ago when an older mechanic in neighboring dealer showed me how he did it. It seemed to make them start better but they were extremely sensitive to choke position. I quit doing it later on. The idea of the drip tube is to drain flooded gasoline off to ground.

MD starting carb questions

jfrankhash

Member

MarkinMo2

Member

sflem849

Well-known Member

sflem849

Well-known Member

pete 23

Well-known Member

Similar threads