Will not stay running. Will start with the choke on and runs for a few seconds then dies

Try opening the choke half way as soon as it starts then all the way open in a few seconds... It only needs the choke to start and should run fine in less than a minute after idleing with the choke not engaged...

Fuel pump and filter are suspected, consider replacement.

Are you sure its not really running out of gas ?
The fuel pump gets power from the pump relay for 3 seconds when you crank the engine, then the computer must "see" oil pressure or RPM to allow the relay to continue powering the pump.
The pump relay may not be working, or the pump may be faulty.

Check both valves could be stuck

Take a look at the automatic choke. On my Znen 150T-18 I had the same problem. The automatic choke was stucn the on position. It would start then when it warmed up the choke would stay on instead of turning off. The engine would turn off.

Loosen fuel cap 1 turn to see if it will stay running.Theres a tank breather hole/vent in the cap and when it becomes plugged no air can get into fuel tank when fuel is used,can also be a plugged fuel filter.

its suffering from fule shortage most likley a blocked running jet in the card ,,,strip the card and clean out the jets with comprested air or card cleaner,,, dont go poking wire into the jets to clean them or you could distroy them,,that why it only runs on full choke

Do you mean that you can start it normally using the choke (that would be choke CLOSED), but then it dies immediately when you move it to run (that would be choke OPEN)? And if you leave the choke in the starting position that it dies after 20-30 seconds?----- If I have that all right, then you definitely have a restriction in the gas supply. Drain all of the gas from the mower and don't use any old gas. If you have any more old gas (from last season) don't use it. If this mower has a gas filter, replace it. Put just a little fresh gas in the tank plus a little of the cleaner. Start it up, do that a few times if needed. Use a fuel additive such as Sea Foam to keep the gas from gumming up so fast.

If you choke or prime the engine, it starts up for a second or two and dies, the carburetor need to be cleaned/repaired.

Hi and welcome to FixYa,

Initially, a few possibilities you may want to check/explore:

• stale gasoline;
• clogged fuel filter (inside the tank above the fuel shutoff valve;
• clogged, bocked, varnished, gummed carbs, jets, air pin holes;
• stuffed air filter/box;
• vacuum leak (rubber coupling, manifold side);
• air leak (airbox base assembly seated/fitted on the carbs.

Basically, a general cleanup of the fuel lines, tank and the carbs. Sitting for some time tends to leave varnish like coating on most parts.

Good luck and Thank you for using FixYa. Happy Holidays.