Engine 12F702-0616-01 (this engine is gravity fed; not the diaphragm pump style) I was given a JD 14PZ mower that has problems starting. In the past it would be really hard to start, but now it won't start at all. The air cleaner gasket is shot so the primer bulb doesn't work, but I am able to pour gas into the carb and have it fire right up....then die shortly thereafter once all the gas I poured in is gone. I pulled the carb and disassembled it and it looked really clean. I made sure the main jet was clear by using a small pin, and blew air through all the other ports I could see. The float and fuel valve works fine; the bowl was full when I pulled it, too. I reassembled and nothing changed. I then applied air pressure to the primer port (A) on the carb by using a small piece of hose and my mouth. Gas came out the hole opposite of it (B). Same result: started up and then died. [IMG]http://i.imgur.com/eY8h1cy.jpg[/IMG] Now the interesting part. I applied air pressure again, but this time plugged port B with my finger. I'm guessing this forced gas through the jet and out the main nozzle into the tube. The mower started right up and ran great...throttled up and down no problem. Shut her down and tried to restart without success. I primed the main jet again the same way and it started up and ran fine. So, my question is if the main jet is not plugged, then what would be causing my issue? I am missing something of how this carb operates... I thought about buying a carb kit (I do need that one gasket), but I'm not sure it would help me since this carb is pretty simple. A kit is $10, a new carb is only $30.

My t-27 trimmer was flooding out and would not start excessive fuel in the cylinder. I cleaned the carb. No help. I installed a new carb and still having the same problem. Any suggestions?