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Mercury 50 Operator's Manual

Mercury 50
75 pages
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TROUBLESHOOTING
66
Starter Motor Will Not Crank The Engine (Electric Start Models)
POSSIBLE CAUSES
Blown fuse in the starting circuit. Refer to Maintenance section.
Outboard is not shifted to neutral position.
Weak battery or battery connections are loose or corroded.
Ignition key switch failure.
Wiring or electrical connection faulty.
Starter motor or starter solenoid failure.
Engine Will Not Start
POSSIBLE CAUSES
Lanyard stop switch not in "RUN" position.
Incorrect starting procedure. Refer to Operation section.
Old or contaminated gasoline.
Engine flooded. Refer to Operation section.
Fuel is not reaching the engine.
a. Fuel tank is empty.
b. Fuel tank vent not open or restricted.
c. Fuel line is disconnected or kinked.
d. Primer bulb not squeezed.
e. Primer bulb check valve is faulty.
f. Fuel filter is obstructed. Refer to Maintenance section.
g. Fuel pump failure.
h. Fuel tank filter obstructed.
Blown fuse. Refer to Maintenance section.
Ignition system component failure.
Spark plugs fouled or defective. Refer to Maintenance section.
Engine Runs Erratically
POSSIBLE CAUSES
Guardian System activated. Refer to Features & Controls ‑ Warning System.
Spark plugs fouled or defective. Refer to Maintenance section.
Incorrect setup and adjustments.
Fuel is being restricted to the engine.
a. Engine fuel filter is obstructed. Refer to Maintenance section.
b. Fuel tank filter obstructed.
c. Stuck anti‑siphon valve located on permanently built‑in type fuel tanks.
d. Fuel line is kinked or pinched.
Fuel pump failure.
Ignition system component failure.
Fuel injection component failure (EFI Models).

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Mercury 50 Specifications

General IconGeneral
Horsepower50 hp
Cylinders3
SteeringRemote
StartingElectric
Displacement995 cc
Fuel Induction SystemEFI (Electronic Fuel Injection)
Alternator Output18 amp
Shaft Length20" / 508 mm
Dry Weight112 kg
Engine Type4-Stroke

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