How to Change Yamaha F225 Engine Oil

Change the engine oil regularly in your outboard and you probably won’t notice anything unusual. 

However, if you neglect changing your outboard’s oil, you’ll probably notice a few things, such as increased temperatures, louder engine noise, poorer compression and worn parts. Changing an outboard’s engine oil is an easy bit of maintenance you can do yourself. Follow the steps below and watch the video above to learn how to change the oil in a Yamaha F225 outboard. 

NOTE: We changed the oil on a Yamaha F225TXRC, but the process is the same or similar for most 4-stroke makes and models.

Tools and Parts Needed – Yamaha F225 Outboard Oil Change


  • Ratchet 
  • 14mm socket
  • 73mm oil filter wrench
  • Torque wrench
  • Drain pan

Yamaha F225 outboard oil change kit

NOTE: You can purchase the oil filter, crush washer and oil separately, but the oil filter kit includes them all, and it costs less to buy the kit.

Changing the Oil in a Yamaha F225 Outboard

PRO TIP: Run the motor for half a minute before changing the engine oil. This warms the oil, which makes it less viscous and helps it drain better.

Step 1. Remove the engine cowling, followed by the oil filler cap from the top of the powerhead.

Yamaha F225TXRC oil change

Step 2. Put a drain pan under the outboard, and remove the 14mm oil drain bolt and crush washer from the right side of the upper casing.

Step 3. Wait for the old oil to drain out, then install a new crush washer (included in the oil filter kit) and reinstall the 14mm drain bolt. Torque the drain bolt to 19 foot-pounds.

Step 4. Remove the old oil filter from the lower right side of the powerhead using a 65mm oil filter wrench.

Yamaha F225 outboard motor oil change

Step 5. Put a thin film of oil onto the new oil filter O-ring, then install the new oil filter (included in the oil filter kit) and torque it to 13 foot-pounds.

Step 6. Fill the engine with Yamalube 10W30 engine oil (included in the oil filter kit), and reinstall the oil filler cap.

Yamaha 225HP outboard oil change

NOTE: The engine will take between 4 and 5 quarts, depending on how thoroughly you drained the old oil.

Step 7. Remove the dipstick and check the oil level. Top off the oil if necessary, then reinstall the engine cowling and you’re done.

Ready to change out the gearcase lube on your Yamaha outboard? Watch the video above to see how to change the gearcase oil on a Yamaha F225 engine. 



Commercial Discounts

Special discounts for companies in the marine industry


Government Sales

Discounts for federal and most state and municipal agencies