Mercury 80 Owner's Manual

TROUBLESHOOTING
58
Starter Motor Will Not Crank the Engine
POSSIBLE CAUSES
• Lanyard stop switch not in "RUN" position.
• Blown 15 AMP fuse. Check 14 pin remote control harness/cowl trim switch/main power relay fuse. 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 solenoid or slave solenoid failure.
Engine Will Not Start
POSSIBLE CAUSES
• Incorrect starting procedure. Refer to Operation section.
• Old or contaminated gasoline.
• Fuel is not reaching the engine.
• Fuel tank is empty.
• Fuel tank vent not open or restricted.
• Fuel line is disconnected or kinked.
• Fuel filter is obstructed. Refer to Maintenance section.
• Fuel pump failure.
• Fuel tank filter obstructed.
• Ignition system component failure.
• Spark plugs fouled or defective. Refer to Maintenance section.
Engine Runs Erratically
POSSIBLE CAUSES
• Overheating - Warning horn not working.
• Low oil pressure. Check oil level.
• 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.
Performance Loss
POSSIBLE CAUSES
• Overheating - Warning horn not working.
• Low oil pressure. Check oil level.
• Throttle not opening fully.

Mercury 80 Specifications

General

Brand	Mercury
Model	80
Category	Outboard Motor
Language	English