Flushing The Cooling System; Fuel System; Fuel Line Inspection; Engine Fuel Filter - Mercury 5 SERIES Service Manual

MAINTENANCE

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 inter-
nal water passages.
NOTE: Do not run the engine while flushing the cooling system.
1. Remove plug and gasket and thread-in hose coupling.
2. Attach a water hose to the hose coupling. Turn on the water gently and flush the cooling
system for 3 to 5 minutes.
3. Remove the thread-in hose coupling and reinstall plug and gasket.
a -
b -

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 al-
low 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 ap-
proved receptacle. Any fuel system service must be performed in a well ventilated area. In-
spect 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 is found, the fuel line or primer
bulb must be replaced.

Engine Fuel Filter

Inspect the fuel line filter. If the filter appears to be contaminated, remove and replace.
Page 1B-4
a
Plug and Gasket
Hose Coupling
b
WARNING
90-857138R1 MAY 2000