Mercury 40 4-Stroke User Manual

MAINTENANCE
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2. Bring the front of the cowl down first and engage the front hook. Lower the cowl into its seated
position and apply downward pressure to the back of the cowl to lock it in place. Gently pull up
on the back of cowl to make sure it is securely fastened.
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Exterior Care
Your outboard is protected with a durable baked enamel finish. Clean and wax often using marine
cleaners and waxes.
Battery Inspection
The battery should be inspected at periodic intervals to ensure proper engine starting capability.
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
!
WARNING
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 - Electric Starting Models
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.

Mercury 40 4-Stroke Specifications

General

Engine Type	4-Stroke
Horsepower	40 hp
Cylinders	3
Fuel Induction System	Electronic Fuel Injection (EFI)
Starting	Electric
Displacement	747 cc
Shaft Length	20 in
Dry Weight	216 lbs
Steering	Remote
Alternator Amp	18 amp / 226 watt
Full Throttle RPM	5500 - 6000 RPM