Changing Oil And Filter; Engine Oil Drain Pump; Changing Filter - Mercury 350 MAG Manual

Section 5 - Maintenance
Engine Model
All Models

Changing 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 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 Specifications).

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 and, using the handle, pump until the crankcase
is empty.
5. Remove the pump.
6. Install the dipstick.

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 L (1 qt) of engine oil will raise the level from the add mark to the top of the OK range.
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.
Page 80
Engine Oil Capacity
4.25 L (4.50 US qt)
c
mc70571-1
Mercury MerCruiser Full‑Synthetic Engine Oil, 20W‑40
a - Typical oil pump
b - Dipstick tube
c - Oil drain hose
33201
Oil filter
Fluid type
90-8M0050539
eng
MAY 2011