Engine Oil Drain Pump; Changing Filter; Transmission Fluid; Checking While The Engine Is Warm - Mercury MerCruiser Tow Sport 5.7 LHS Manual

Section 5 - Maintenance
4. Place the oil drain hose in a suitable container.
5. Remove the drain plug from the oil drain hose.
6. After the oil has drained completely, install the drain plug in the oil drain hose.
7. Push the hose through the bilge drain and install the plug.

Engine Oil Drain Pump

1. Loosen the oil filter to vent the system.
2. Remove the dipstick.
3. Install the oil pump onto the dipstick tube.
a
b
4. Insert the hose end of the crankcase oil pump onto an appropriate container. Pump out the oil until the crankcase is empty.
5. Remove the pump.
6. Install the dipstick.

Changing Filter

1. Remove and discard the oil filter.
2. Apply engine oil to the sealing ring on the new filter and install.
3. Tighten the oil filter securely following the filter manufacturer's instructions. Do not overtighten.
4. Remove the oil fill cap.
IMPORTANT: Always use the dipstick to determine exactly how much oil is required.
5. Add engine oil to bring the 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. Add oil as necessary to bring the oil level up to, but not over, the
FULL or OK range.
NOTE: Adding 0.95 L (1 US qt) of engine oil will raise the level from the ADD mark to the top of the OK range.
Models
Engine oil (with filter)
7. Start the engine. Run the engine for three minutes and check for leaks. Stop the engine. Allow approximately five minutes
for the oil to drain into the oil pan. The boat must be at rest in the water.
8. Check the oil level.

Transmission Fluid

Checking While the Engine is Warm

1. Velvet Drive transmissions ‑ Stop the engine and immediately 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.
2. ZF Marine transmissions ‑ Stop the engine and remove the dipstick to check level. If fluid is below top (full) line, add
specified fluid through dipstick hole. Do not overfill. Reinstall dipstick with cap fully seated.
3. Walter V‑Drive transmissions ‑ Stop the engine and remove the dipstick to check the level. If the fluid is below the top (full)
line, add the specified fluid through the breather elbow. Do not overfill. Reinstall the dipstick with the cap fully seated.

Checking While Engine is Cold

NOTE: Cold fluid level check: To ease checking the fluid level, the dipstick can be marked or scribed with a cold level mark.
1. Follow the procedure for the warm fluid level check, then allow the boat to sit overnight.
IMPORTANT: Be sure to push the dipstick all the way down into the dipstick tube when checking the fluid level.
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a - Typical oil pump
b - Dipstick tube
c - Oil drain hose
c
mc70571-1
Capacity
4.25 L (4.5 US qt)
Fluid Type
Mercury/Quicksilver 25W‑40 Synthetic Blend
Engine Oil, NMMA FC‑W Catalyst
Compatible rated
90-8M0086943 DECEMBER 2014
eng