I ran the crawler out of gas, and it now wants to run on one cylinder and back-fire out the other. I pulled the carb to make sure nothing was clogged and found a plastic tapered sleeve in the throat. Carb tag says "Marvel-Schebler TSX-530," with the number"70" stamped beneath the "TSX." The plastic sleeve has the number "46-A245" with "-7/8-"
beneath the number. Am I correct in guessing that this sleeve was for high-altitude operation? It was on a mountain ranch (about 5,000 ft elevation) and is now in the flatland (2,200 ft).
Thanks, Phil Rennegarbe
Inyokern, Ca.
40C Carb Question
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Philthytoo
- 40C crawler
- Posts: 11
- Joined: Sun Dec 09, 2007 12:50 pm
- Location: Inyokern, Ca
Phil , sounds more like you have something other wrong than carburetion , Do a quick compression test to see if a valve stuck on #2 cylinder , if I remember the internals of my carburetor right what you are describing is the venturi . Dan
1956 420C with GSC blade
Tools are to men as shoes are to women , you can never have too many !!
Used diesel engines are an adventure any way you look at them !!
Tools are to men as shoes are to women , you can never have too many !!
Used diesel engines are an adventure any way you look at them !!
Hi Phil-
When you pulled the carb, did you check to see if the float was stuck in the "down" position? I have a Marvel-Schebler carb on my Ford 8N tractor, and when it is run dry it seems to stick the float in one position or the other. While the more common float issue seems to be floats stuck in the "up" position (which leads to fuel starvation), I have had floats stick in the "down" position which leads to fuel overflow and backfiring. Just a thought.
When you pulled the carb, did you check to see if the float was stuck in the "down" position? I have a Marvel-Schebler carb on my Ford 8N tractor, and when it is run dry it seems to stick the float in one position or the other. While the more common float issue seems to be floats stuck in the "up" position (which leads to fuel starvation), I have had floats stick in the "down" position which leads to fuel overflow and backfiring. Just a thought.
(1) JD Straight 450 crawler dozer with manual outside blade; (2) JD 2010 diesel crawler loaders; (1) JD 2010 diesel dozer with hydraulic 6-way blade; (2) Model 50 backhoe attachments, misc. other construction equipment
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Philthytoo
- 40C crawler
- Posts: 11
- Joined: Sun Dec 09, 2007 12:50 pm
- Location: Inyokern, Ca
Thanks for all the ideas!
I'll check for a stuck valve, came across an older posting where somebody said they found a valve had got stacked up with carbon and wouldn't close all the way. The floats appeared to be loose, but there was some gas dripping out when I ran it last, so maybe they were stuck and I shook 'em loose when taking it apart. Be nice if it was that easy!
Never seen a removable venturi like this before, always were cast into the body of the carb... learn something new every day!
Thanks again, Phil
I'll check for a stuck valve, came across an older posting where somebody said they found a valve had got stacked up with carbon and wouldn't close all the way. The floats appeared to be loose, but there was some gas dripping out when I ran it last, so maybe they were stuck and I shook 'em loose when taking it apart. Be nice if it was that easy!
Never seen a removable venturi like this before, always were cast into the body of the carb... learn something new every day!
Thanks again, Phil
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