To fix a primer bulb on a lawn mower, follow these steps:
1. Locate the primer bulb on your lawn mower.
2. Check for any visible damage or cracks in the bulb.
3. If the bulb is damaged, replace it with a new one.
4. Disconnect the fuel lines connected to the primer bulb.
5. Remove the old bulb and install the new one in its place.
6. Reconnect the fuel lines securely.
7. Press the primer bulb a few times to ensure it's working properly.
8. Start the lawn mower and check if the primer bulb is functioning correctly.
Remember to take proper safety precautions and consult the lawn mower's manual if needed.