1. Park the lawn mower on a level surface and turn off the engine. Allow it to cool down.
2. Disconnect the spark plug wire from the spark plug to prevent the engine from starting accidentally.
3. Locate the oil drain plug. It is usually located on the bottom of the engine, near the oil filter.
4. Place an oil pan under the oil drain plug to catch the old oil.
5. Remove the oil drain plug. Be careful not to spill any oil.
6. Allow all of the old oil to drain out.
7. Replace the oil drain plug and tighten it securely.
8. Remove the oil filter. It is usually located near the oil drain plug.
9. Apply a thin coat of new oil to the gasket of the new oil filter.
10. Screw on the new oil filter until it is snug. Do not over-tighten.
11. Add new oil to the engine. The amount of oil required will vary depending on the model of your lawn mower. Refer to the owner's manual for the correct amount.
12. Check the oil level. The oil level should be between the "full" and "add" marks on the dipstick.
13. Replace the dipstick and tighten the cap.
14. Reconnect the spark plug wire to the spark plug.
15. Start the lawn mower and let it run for a few minutes. This will circulate the new oil throughout the engine.
16. Check for any leaks. If you see any leaks, immediately tighten the oil drain plug or oil filter.
That's it! You have now successfully changed the oil for your Jacobson 123V lawn mower.
