I am having a heck of a time with my 1968 Bolens Estate Keeper EK-10. It has sat for a couple of years since it stopped running a while ago and I haven't had the chance to try to fix it for a while. I started working on it earlier in the summer and I found the gas tank looked pretty rusty and there was a lot of sediment in it. I tried to flush it out and clean it, but it still looks to have a lot of rust inside, so I replaced it with a clean plastic tank since I was worried about all that messing up the carburetor. I also installed a nice big automotive gas filter in line to help keep the gas flowing to the carburetor clean.
The carburetor was pretty gunky and nasty inside from the bad gas, so I completely disassembled it and soaked it in a gallon bucket of carburetor cleaner solvent for a few days. Then I took it out and sprayed it with a bottle of carburetor cleaner, let it dry, and reassembled it. I adjusted it according to Wisconsin's specifications in the service manual for the engine and put it on the engine.
However, it does not want to run now. It is hard to start and only wants to start and run with the choke on full. To me, this seems like it is running very lean, but I'm not sure what is causing it. I did notice that the throttle shaft is very loose and has a lot of end-play in it. The throttle plate is also probably worn a bit. I'm not sure if this is entirely the cause of my problems or not, but I'm thinking it isn't helping. Otherwise, I don't see anything wrong at all with this carburetor that would prevent the engine from running.
I have made a video of trying to start the engine in the hopes that this might help troubleshoot the problem:
As you can see, when it does run, it seems to run just fine and the engine picks up RPMs nicely up until it eventually dies. It also looks like it backfires through the carburetor occasionally for some reason. But it refuses to stay running. This thing has really got me baffled and I'm running out of ideas. Is this carburetor just junk at this point and I will need another one in better shape or can it be fixed at all? Do they make a rebuild kit for these carburetors that will fix the play in the throttle shaft?
I also posted a few pictures of the carburetor, including one where you can see fuel vapor leaking out of the intake.
Any help would be very much appreciated! I'd love to get this thing running here before winter comes and the snow starts flying!