Changing Oil And Filter; Easy Engine Oil Drain System; Engine Oil Drain Pump - Mercury Mercruiser Tow Sport 5.7 MPI Manual

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).

Easy Engine Oil Drain System

NOTE: Boat must be out of water to perform this procedure.
1. Loosen the oil filter to vent the system.
2. Remove the bilge drain plug.
3. Pull tether through the bilge drain.
a
a - Blige drain plug
b - Tether
c - Clip
d - Oil drain hose plug
e - Oil drain hose
f - Bilge drain flange
4. Place the oil drain hose in a suitable container.
5. Remove the drain plug from the oil drain hose.
6. After oil has drained completely, install the drain plug in the oil drain hose.
7. Push the hose through 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 and, using the handle, pump until the
crankcase is empty.
5. Remove the pump.
6. Install the dipstick.
90-8M0076545 NOVEMBER 2012
eng
c
b
c
mc70571-1
d
a - Typical oil pump
b - Dipstick tube
c - Oil drain hose
Section 5 - Maintenance
e
f
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