Suzuki DF2.5 Owner's Manual page 22

2. Remove the oil filler cap 4.
3. Add the recommended engine oil until the oil
level reaches the upper limit.
Upper limit
Lower limit
20
NOTICE
Running the engine with an excessive
amount of oil can damage the engine.
Do not overfill the engine with oil.
4. Tighten the oil filler cap securely.
• Visually check the propeller to make sure
it is not damaged.
• Make sure the motor is securely mounted
to the transom.
• Make sure the tilt pin is securely installed
in the proper position.
• Make sure the starter rope is free from any
evidence of fraying or wear.
• Make sure you have the boating safety
and emergency equipment on board.