Sovereign petrol mower?

there could be dirt in the fuel. empty the tank out and put fresh fuel in , check that you have oil in the engine with the dipstick on the side, check the idle screw has not fallen out, if you follow the rev cable down , you will see the idle screw, you can adjust it to get it to run faster, but just a little, try that first. the idle screw has a spring on it

j
August 2014