
Starter Motor Will Not Crank the Engine
POSSIBLE CAUSES
•
Lanyard stop switch not in RUN position.
•
Open 20‑amp fuse. Check the power driver 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 starter relay 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 antisiphon valve located on permanently built‑in type fuel tanks.
d. Fuel line is kinked or pinched.
•
Fuel pump failure.
TROUBLESHOOTING
eng
83
Содержание 300R HD CMS Mechanical
Страница 1: ...Operation and Maintenance Manual 2018 Mercury Marine 300R HD CMS Mechanical 8M0140585 518 eng...
Страница 2: ...eng...
Страница 6: ...eng iv...
Страница 10: ...eng viii...
Страница 45: ...NOTE Exceeding 4250 RPMs the engine PCM will begin Engine Guardian protection FEATURES AND CONTROLS eng 35...