Changing Fluids - Mercury D4.2L Manual

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Changing Fluids

See Maintenance Schedules for lubricant change interval. Lubricant should be changed before placing boat in
storage.
Power Trim or Power Steering fluids do not require changing.
Coolant in closed cooling system should be changed at specified intervals by your Authorized Mercury
MerCruiser Dealer.
CRANKCASE OIL AND FILTER - D3.6L, D4.2L, D2.8L D-TRONIC AND D4.2L D-TRONIC
IMPORTANT: Change oil when engine is warm from operation. Warm oil flows more freely, carrying
away more impurities. Use only recommended motor oil (refer to "Specifications").
1
Start engine and allow it to warm up to normal operating temperature.
2
Stop engine and allow some time for oil to drain into oil pan (approximately 5 minutes).
3
Remove fitting from end of crankcase oil drain hose laying on top of engine.
A
Fitting - D3.6L and D4.2L
B
Oil drain hose - D3.6L and D4.2L
C
Fitting - D2.8L D-Tronic and D4.2L D-Tronic
D
Oil drain hose - D2.8L D-Tronic and D4.2L D-Tronic
4
Install crankcase oil pump onto threaded fitting of oil drain hose.
A
Crankcase oil pump (Quicksilver Part Number 90265A2)
B
Threaded Fitting
5
Pump oil out of crankcase into drain pan. When crankcase is empty, remove pump and reinstall crankcase
oil drain hose fitting. Tighten securely.
6
Remove and discard oil filter and sealing ring. Coat sealing ring on new filter with oil and install filter. Hand
tighten only, do not use a filter wrench.
7
Remove oil fill cap and refill engine with new oil (refer to "Specifications" for quantity and grade of oil).
A
D3.6L and D4.2L
B
D2.8L D-Tronic and D4.2L D-Tronic
IMPORTANT: When refilling engine with oil always use dipstick to determine how much oil is required.
Avoid possible injury, or damage to oil dipstick and internal engine components. Do not remove crank-
case oil dipstick when engine is running. Stop the engine completely before removing or inserting dip-
stick.
IMPORTANT: On D3.6L and D4.2L Engines only: After oil change, pre-lubricate turbocharger and en-
gine. To do this, move the STOP switch toggle lever DOWN and hold in this position while you turn the
key switch to START position. Doing this TOGETHER turns the engine without starting it. DO NOT en-
gage starter for more than 15 seconds; allow at least one minute cool down time before re-engaging
starter for another 15 seconds. Watch that starter does not overheat.
CAUTION
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