Petrol Lawnmower Guide

Adjusting Petrol Lawnmower Fuel Mixture

Adjusting fuel mixture
1 Allow the engine to reach running temperature and set the throttle to idle.
2 Turn the idle mixture screw - located on the carburettor - clockwise slowly until the engine speed begins to decrease.
3 Turn the idle mixture screw anti-clockwise slowly until the engine speed, after increasing, begins to decrease again.
4 Count the turns and position the screw mid-way between the two points.


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