1 Check the oil and procedure for your exact engine
Find the viscosity, specification, volume in the manual, and whether the oil is drained through the plug or the fill tube. SAE 30 is common but not a universal choice.
2 Warm up and safely prepare the lawnmower
Run the engine for a few minutes, then turn it off, close the fuel valve if equipped, and remove the spark plug cap. Let the exhaust cool down enough for safe work.
3 Drain the old oil
Position the container and open the drain plug or tilt the lawnmower to the side specified by the manufacturer, usually with the air filter and spark plug facing up. Let the oil drain completely.
? Tip: Write down the date and working hours; regular annual replacement is often required even when the lawnmower has not reached the full service interval.
4 Pour in the initial amount
Reinstall the plug with a good gasket and add slightly less than the specified volume through a funnel. Wait, then check the dipstick on a flat surface according to the manual, with the cap screwed in or resting as specified.
⚠ Warning: Too much oil can cause smoke, hard starting, and engine damage. Do not pour the entire bottle without checking the volume.
5 Top up, try, and dispose of the oil
Top up in small amounts to the correct level, replace the spark plug cap, and briefly run the engine. Check for leaks, measure the level again, and hand over the old oil to an authorized collector.
