...Today I got a new carb that is exactly like the original. Put it on a few hours ago and it fired up, and whwn the choke was closed, it still ran for a couple minutes, although roughly, and then died.

Was the engine warmed up when you closed the choke? If so that is the behavior I would expect. The choke is supposed to be open when the engine is warmed up, not closed.

Perhaps I'm missing something here.

 

I followed the same procedure I have always done for the twelve years I have owned it. Open the choke, pump the primer and when she starts I closed the choke. Always worked fine in the past.

 

sorry i have been confusing closed and open. maybe i should be saying off and on.

 

Yes, that is what threw me. An "open" choke is not blocking any air to the engine and this the way it runs normally after it starts and is warmed up. A "closed" choke is turned so as to partially block the airflow into the carburetor, thus enriching the fuel mixture and aiding the engine starting. If the choke is closed after the engine is warmed up then it will run terribly and maybe won't run at all.

 

Would the little rod that hooks the carb to the trottle or govenor cause problems like this if it was bent a little or something? Just grasping at straws at this point. Any help appreciated.

Okay, now that we've got our terms straight on open and closed choke, yes the little rod that connects the throttle to the govenor could be in the wrong hole. Did you (I hope) take pictures when you took the old carburetor off? If not, check the diagram in the owner's manual if it is there, or the service manual (often found online) for your model snowblower.

 

Hi and welcome to the forum, did you clean the emulsion tube in the old carb? if not that may be where the problem still is.