Flushing The Cooling System; Top Cowl Removal And Installation; Fuel System - Mercury 140 Manual

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MAINTENANCE
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FLUSHING THE COOLING SYSTEM

Flush the internal water passages of the outboard with fresh water after each use
in salt, polluted or muddy water. This will help prevent a buildup of deposits from
clogging the internal water passages.
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Remove the plug from fitting in the bottom cowl.
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Attach a water hose to the fitting. Turn on the water and flush for 3 to 5 minutes.
Note: Engine can be stopped or running at idle speed when flushing the cooling
system. Do not flush engine using a water system that exceeds 45 psi.
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TOP COWL REMOVAL AND INSTALLATION

Removal
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Pull out the front cowl latch.
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Lift up the rear cowl latch. Remove the top cowl.
Installation
Lower top cowl into position over engine. Push down the rear cowl latch to lock
down the rear and push in the front cowl latch to lock down the front.
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FUEL SYSTEM

Avoid serious injury or death from gasoline fire or explosion. Carefully
follow all fuel system service instructions. Always stop the engine and
DO NOT smoke or allow open flames or sparks in the area while servicing
any part of the fuel system.
Before servicing any part of the fuel system, stop 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.
Fuel Line Filter (Models With Carburetors)
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Inspect the fuel line filter. If the filter appears to be contaminated, remove and
replace.
IMPORTANT: Visually inspect for fuel leakage from the filter connections by
squeezing the primer bulb until firm, forcing fuel into the filter.
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FUEL SYSTEM (CONTINUED)
Water Separating Fuel Filter (Models with Electronic Fuel
Injection)
Note: The warning system will turn on when water in the fuel filter reaches the full
level. Refer to "Warning System" in Features & Controls Section.
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This 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.
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 in the direction of the arrow (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. Reconnect 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.
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WARNING
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