I have a deere 350 gas dozer that will not start. i can get it to run with ether but will not stay running. the fuel

Hi my names Mitchell and I'm a HD mechanic. I hope I can help you figure out this issue with your dozer.

the engine obviously isn't getting any fuel. When you took the carb off did you just quickly blow it out or did you dissasemble and clean the carb? The needle and float bowl need to be cleaned out and the jet should also be cleaned. Is there an accelerator pump circuit on this carb?

Oh sorry on some carbs there's a little plunger that when you give it full throttle it physically squirts a bit more fuel into the barrel to get the engine up to speed quicker. You'd know it has it because when you move the throttle linkage it would feel like it's moving a diaphragm.
When you took the carb apart was there fuel in the bowl? Just trying to make sure you have fuel actually making it into the carb. Check the foat for cracks or if it's taking on fuel inside and not functioning properly. Up behind the jet there is sometimes an emulsion tube that can also get plugged. I would physically remove the jet and tube and shine light through that to see if there's anything plugging it.
Inside the barrel of the carb on either side of the the butterfly valve for the throttle plate there is some tiny holes that should be cleared as well. Brake clean and compressed air works well. One more thing to check is your choke circuit and linkage. Hook the carb up and remove the float bowl. Fuel should flow until you lift up the float thats hanging down.
Carbs are fairly simple things I've found that 90% of the time it's just a matter of clearing all the tiny little passages. If fuel is making it into the bowl the vacuum of the engine should pull it up through the immulsion tube and out the jet and the surrounding tiny ports to keep a steady idle.
I hope this info has helped
Feel free to ask any more questions.

I would say it depends on how heavily you rely on the dozer. If there is a replacement carb avalible and it's not an arm and a leg that's what I would go with. Beats fiddling with the carb and possibly not even the acid can help sometimes. Sometimes if a carb sits long enough condensation and rotting gas can eat away at the internals of a carb.

they are all pre assembled. Pretty much bolt on. Hook up your fuel and go. You may have to fine tune the idle but it's set within the ballpark and then it's just a matter of adjusting the idle adjustment screw. If it was me and the machine was how I made a living I would get the 450 one. But if you use it intermittently I would go with the 250 one. Like I said there's really not a lot to them it's just cast metal and gaskets. For the price difference I would deffinatly buy new though. 170 for a kit is alot when a new one is 250.

No problem! Glad I could help!