Transmission Fluid - Mercury MerCruiser Service Manual

5. Remove the oil fill cap.
IMPORTANT: Always use the dipstick to determine exactly how much oil is required.
6. Add the specified engine oil to bring the level up to the minimum oil fill mark on the dipstick.
Tube Ref No.
Mercury 25W-40
Synthetic Blend 4-Stroke
139
Engine Oil
7. With the boat at rest in the water, remove the dipstick and check the oil level. Add the specified engine oil to bring the level
up to, but not over, the maximum oil fill mark on the dipstick.
8. Start the engine, run the engine for three minutes, and check for leaks. Stop the engine immediately if leaks exist. Check
the installation.
9. Allow approximately five minutes for the oil to drain into the oil pan.
10. With the boat at rest in the water, remove the dipstick and check the oil level.
11. If needed add additional oil, but not over, the maximum oil mark on the dipstick.

Transmission Fluid

Checking the Fluid Level Before Operation
IMPORTANT: Always check the fluid level before starting and operating.
90-8M0099748 eng DECEMBER 2015
Oil fill cap V-drive model shown
Description
58405
Where Used
All MerCruiser engines
© 2016 Mercury Marine
Maintenance
Part No.
92-8M0078629
Page 1C-11