Mower starts runs begins to back fire and run

plugged fuel filter or fuel line?

You either need a carburetor rebuild or you need a valve adjustment. Either of these things would cause this to happen.

Good Luck!

Jim

Hello, Nice mower I had one years ago. Does it start right back up? Or does it need to cool down for an hour or so befroe restarting?

Matt

If you need further help, I’m available over the phone at https://www.6ya.com/expert/matt_8dbc24bf722649ac

You can try cleaning and rebuilding the carb.if that don,t work i would suggest you replace the carb.

Sounds to me like you need to replace the ignition coil,they will go open when they get hot and when this happens the plugs will stop fireing.

had same problem with a small 2 cycle outboard motor last year. I had run it during the summer, put it away for the winter and when I went to fire it up the following Spring it would only run with half to full choke. Old fuel had gummed up the carburater by letting it sit in there for a few months, had to disassemble and clean all the carb parts (including the jets) and it worked good as new. You could do it yourself or take carb to a small engine repair shop and have them do it. May or may not require a rebuild kit depending on how gummed up it is. Hope this helps.

Ignition key on, throttle three quarters on, full choke, press primer 3 or 4 times, pull cord. Should cough, maybe start and run rough, then as it's chugging, turn choke to half, then quarter choke, let it warm up slightly, then choke off.

Small piece of dirt or debis under the fuel inlet needle causing the engine to flood out. I would clean the seat with a q-tip and a little jewlers rouge, polish the seat and install a new needle. Hope this helps. If it still leaks then replace the needle and seat due to it being damaged

the valves need adjusting

if its a 2 stroke (gas oil mix) there is an air leak in the crank case. a new gaskit is in order