Fuel System - Mercury 40 CT Maintenance And Installation Manual

2. Ensure the battery is secure against movement.
3. Battery cable terminals should be clean, tight, and correctly installed.
Positive to positive and negative to negative.
4. Ensure the battery is equipped with a nonconductive shield to prevent
accidental shorting of battery terminals.

Fuel System

Fuel is flammable and explosive. Ensure that the key switch is off and the
lanyard is positioned so that the engine cannot start. Do not smoke or allow
sources of spark or open flame in the area while servicing. Keep the work
area well ventilated and avoid prolonged exposure to vapors. Always check
for leaks before attempting to start the engine, and wipe up any spilled fuel
immediately.
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 the 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.
ENGINE FUEL FILTER
Check the fuel filter for water accumulation or sediment. If water is in the fuel,
remove the sight bowl and drain the water. If the filter appears to be
contaminated, remove and replace.
REMOVAL
1. Read the preceding fuel system servicing information and warning.
2. Pull out the filter assembly from the mount. Hold onto the cover to prevent
it from turning and remove the sight bowl. Empty contents into an
approved container.
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MAINTENANCE
WARNING
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