Regal 53 SC Owner's Manual page 238

Overview- Transmission Oil (Fluid) & Filter
The transmission planetary gear set (ZF) is lubricated by
Mercury 0W-30 Synthetic Oil (92-858076k01). This oil
blend helps the internal gears provide a more friction-free
surface less prone to wear.
Checking Transmission Oil (Fluid) & Filter
1. The transmission dipstick can be accessed and re-
moved through the opening in the Zeus top cover or
with the cover removed.
2. Remove the dipstick by turning it counterclockwise.
Wipe with a clean, lint free cloth.
3. Insert the dipstick, resting it on top of the threaded
hole.
TRANSMISSION
DIPSTICK
Engine & Controls
4. Remove the dipstick and check the oil level indicated.
The level should be between the minimum and maximum
dipstick marks as shown.
5. If the oil level is correct, reinstall the dipstick.
6. If the level is low, add the specifi ed transmission oil
through the dipstick threaded hole to bring up to the
maximum mark on the dipstick.
Note: Your vessel incorporates along with the transmis-
sion a drop box assembly which requires additional pow-
er steering fl uid to fi ll it. Use synthetic power steering
fl uid SAE 0W-30 weight (92-858077K01 Mercury part
number).
7. Start the engine and run for three minutes at 1500
rpm's to fi ll the hydraulic circuits. Do not operate the en-
gine above 1500 rpm's to avoid excessive exhaust aeration
which can damage the Zeus seawater pumps.
8. Stop the engine and check the oil level.
9. Add the specifi ed transmission oil to bring a low oil
reading up to the maximum dipstick level.
10. Install the dipstick.
11. If needed, install the Zeus top drive cover.
49
MAX. MIN.
FULL FULL
MARK MARK