Changing Filter; Transmission Fluid; Checking While The Engine Is Warm - MerCruiser 8.1S HO Owner's Manual

Section 5 - Maintenance

CHANGING FILTER

1. Remove and discard oil filter.
2. Coat sealing ring on new filter with engine oil and install.
3. Tighten oil filter securely (following filter manufacturer's instructions). Do not
overtighten.
4. Remove oil fill cap.
IMPORTANT: Always use dipstick to determine exactly how much oil is required.
5. Add recommended engine oil to bring level up to the bottom of the OK range on the
dipstick.
6. With the boat at rest in the water, check the oil level and add specified fluid to bring the
oil level up to, but not over, the full or OK range.
NOTE: Adding 0.95 liters (1 quart) of engine oil will raise the level from the add mark to the
top of the OK range.
Engine Oil (With Filter)
7. Start the engine, run the engine for three minutes, and check for leaks. Stop the engine.
Allow approximately 5 minutes for the oil to drain into the oil pan. The boat must be at
rest in the water.

Transmission Fluid

Checking While the Engine is Warm

1. Velvet Drive Transmissions ‑ Stop engine and quickly check fluid level by turning
T‑handle counterclockwise, to remove dipstick. Fluid level should be up to full mark. If
low, add specified fluid through dipstick tube on transmissions.
Page 62
a - Oil filter
All Models Capacity
8.5 liters
(9 U.S. Quart)
8479
Fluid Type
Mercury/Quicksilver Synthetic Blend MerCruiser Engine Oil
25W‑40
90-864841062 DECEMBER 2006
a