Mercury 150 Operation, Maintenance And Installation Manual page 56

Before servicing any part of the fuel system, stop the engine and disconnect
the battery. Drain the fuel system completely. Use an approved container to
collect and store fuel. Wipe up any spillage immediately. Material used to
contain spillage must be disposed of in an approved receptacle. Any fuel
system service must be performed in a well‑ventilated area. Inspect any
completed service work for sign of fuel leakage.
FUEL LINE INSPECTION
Visually inspect the fuel line and primer bulb for cracks, swelling, leaks,
hardness, or other signs of deterioration or damage. If any of these conditions
are found, the fuel line or primer bulb must be replaced.
WATER-SEPARATING FUEL FILTER
NOTE: The warning system will turn on when water in the fuel filter reaches the
full level. See Features and Controls ‑ Warning System .
The water‑separating fuel filter removes moisture and also debris from the fuel.
If the filter becomes filled with water, the water can be removed. If the filter
becomes plugged with debris, the filter must be replaced with a new filter.
1. Remove and replace filter as follows:
a. Turn ignition key switch to "OFF" position.
b. Disconnect wire at bottom of filter.
c. Remove filter by turning the filter clockwise. Tip the filter to drain fluid
in a suitable container.
d. Lubricate the sealing ring on the filter with oil. Thread on the filter and
tighten securely by hand. Connect the wire to the filter.
IMPORTANT: Visually inspect for fuel leakage from the filter by squeezing the
primer bulb until firm, forcing fuel into the filter.
MAINTENANCE
46
28434
eng