Mercury MERCRUISER, Service Manual, Page: 25 / 566

4. Remove the dipstick and observe the oil level. The oil level must be no higher than the maximum oil level mark and no
lower than the minimum oil level mark.
5. If the oil level is low, refer to
Filling
.
6. Install the dipstick into the dipstick tube.
Filling
IMPORTANT: Always use the dipstick to determine the exact quantity of oil or fluid required.
1. Remove the oil fill cap from the oil fill tube.
58405
Oil fill cap
58404
In-line drive model shown
IMPORTANT: Do not overfill the engine with oil.
2. Add the specified engine oil to bring the level up to, but not over, the maximum fill line on the dipstick.
Engine Oil Capacity Fluid type
4.73 L (5.0 US qt) Mercury 25W‑40 Synthetic Blend 4‑Stroke Engine Oil
3. Confirm that the engine oil level is now up to, but not over, the maximum fill line on the dipstick.
4. Install the oil fill cap.
Changing the Engine Oil and Filter
Refer to the maintenance schedule for the change interval. Engine oil should be changed before placing the boat in storage.
IMPORTANT: Change the engine oil when the engine is warm from operation. Warm oil flows more freely, carrying away more
impurities. Use only recommended engine oil (refer to
Fluid Specifications
).
Draining Using a Crankcase Oil Pump
1. Loosen the oil filter to vent the system.
2. Remove the dipstick.
Maintenance
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 1C-9