I have an old Bolens mower, Model number 13AM761F065. When I tried to start it today gas came flooding out of the exhaust. I suspected the carb because I've had trouble with this before. My mower came, used, with a replacement carb installed and the original carb. The replacement worked fine until a few weeks ago. It was letting gas to flow through and I could even see gas filling up in the inlet under the air filter. I looked at the float and needle and it seemed fine, but couldn't get the leaking to stop. So I swapped back to the original carb and it worked fine. Until today. Well, I thought to myself, this is probably why they swapped out the original carb in the first place. I get the new carb and make sure the gasket is on correctly, I hook it up to the gas line and power and even when the key is turned on, it is not leaking gas.
Great, I think, maybe it was a gasket issue that is now resolved. I hook it up and... same problem. Any advice?