How do you fix petrol lawnmower which has diesel in?

It's not possible to fix a petrol lawnmower that has diesel in it. Diesel is a heavier fuel than petrol and will cause the engine to run too hot, leading to damage to the engine components. You will need to drain the diesel from the lawnmower and replace it with petrol.

To do this, you will need the following tools:

* A funnel

* A hose

* A container to catch the diesel

Instructions:

1. Place the lawnmower on a level surface.

2. Remove the fuel tank cap.

3. Insert the hose into the fuel tank and connect the other end to the container.

4. Open the fuel valve and allow the diesel to drain into the container.

5. Once all of the diesel has been drained, close the fuel valve and remove the hose.

6. Replace the fuel tank cap.

7. Add petrol to the fuel tank.

8. Start the lawnmower and allow it to run for a few minutes to mix the petrol and diesel.

The lawnmower should now be running properly.