Fuel System - Mercury 50 4-Stroke Manual

IMPORTANT: Read the safety and maintenance instructions
which accompany your battery.
1. Turn off the engine before servicing the battery.
2. Add water as necessary to keep the battery full.
3. Make sure the battery is secure against movement.
4. Battery cable terminals should be clean, tight, and correctly
installed. Positive to positive and negative to negative.
5. Make sure the battery is equipped with a non‑conductive
shield to prevent accidental shorting of battery terminals.

Fuel System

Fuel is flammable and explosive. Ensure 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 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.
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.
MAINTENANCE
WARNING
!
68