Honda Izy mower ?

Hi
I have started to experience problem with a Honda izzy self propelled mower 18"
Started to run rough (hunting) & slight smoking and now stops.

Oil at correct level on Dip

Plate on side near carb reads:
GJAFE 2840112 MD4

Plate on blade body :
HRG 465C3 SDE
MADF
2008
2.0KW
2850 min
33kg


purchased from new About two years old with easy start (no choke)

otherwise always very good smooth continuous runner. Not serviced since purchased

thanks
Gary