Mercury 60 Bigfoot 4 stroke Problems
| Engine Model: Mercury Bigfoot 60 |
| Engine Type: 4-stroke inline 4-cylinder SOHC gasoline outboard engine |
| Total Displacement: 60.8 cu.in (995 cc) |
| Rated Engine Power: 60 Hp (44.1 kW) at 6000 rpm |
| Fuel System: Electronic fuel fnjection (EFI) |
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| Engine starts hard or doesn't start |
No fuel in fuel tank - Add gasoline.
Wrong grade of gasoline - Use quality gasoline.
Air or water in fuel system - Remove water or air from fuel system.
Defective spark plug wire connection - Check spark plug wiring connection, repair or change.
Damaged spark plug - Install new spark plug.
Plugged fuel filter - Fuel filter needs to be replaced.
Worn or damaged vapor separator needle valve - Install new needle valve.
Dirty fuel lines - Service fuel lines.
Fuel tank air vent restricted or closed - Fuel tank air vent need to be opened or cleaned.
Faulty fuel feed pump - Replace or rebuild fuel feed pump.
Damaged or not adjusted choke cable - Adjust properly or replace the cable.
Incorrect valve clearance - Need to adjust valve clearance.
Improper valve timing - Set the valve timing correctly.
Low fuel pressure - Check system for fuel leaks or check low pressure fuel pump.
Damaged or clogged fuel injector - Clean or replace as required.
Fuel regulator failure - Install new fuel regulator.
ECM is not functioning - Change electronic control modul.
| Engine starts and stalls immediately |
Defective spark plug - Change spark plug.
Worn or damaged vapor separator needle valve - Install new needle valve.
Ignition coil is not working - Ignition coil should be replaced.
Closed or restricted fuel tank air vent - Open or clean air vent.
Faulty fuel pump - Replace or rebuild fuel pump.
Damaged choke system - Inspect and replace choke system components.
Valve clearance is improper - Adjust to proper valve clearance.
Valve timing is incorrect - Set the valve timing correctly.
Valve springs are broken or bad - Valve springs need to be changed.
Valves sticking - Service the valves.
Low cylinder compression - Check and replace worn parts.
Fuel filter is clogged - Replace or clean fuel filter.
Fuel injector is clogged or malfunction - Clean or install new injector.
Low engine oil level - Add oil to the engine crankcase.
Oil pump malfunction - Change oil pump.
Water intake is blocked - Clean and wash as required.
Thermostat is faulty - Change thermostat as required.
Faulty water pump - Change water pump as required.
Ignition system malfunction - Check ignition and replace faulty components.
Clogged or damaged fuel pump - Inspect fuel pump and change as required.
Worn or damaged vapor separator needle valve - Install new needle valve.
Clogged fuel lines - Fuel lines need to be cleaned.
Fuel tank air vent clogged or closed - Open or clean air vent.
Clogged fuel filter - Install new filter.
Intake manifold is air leaking - Replace intake manifold gasket.
Water intake screen is dirty - Clean and wash as required.
Throttle valve and throttle link are damaged or worn - Replace faulty components.
Damaged or clogged fuel injector - Clean or replace if necessary.
Engine is running overloaded - Reduce the load.
Fuel injector or fuel pump is dirty - Replace or clean as required.
Ignition timing is improper - Ignition timing needs to be set properly.
Defective thermostat - Change thermostat as required.
Faulty water pump - Change water pump as required.
Propeller pitch or diameter incorrect - Replace propeller.
Propeller bent or damaged - Replace propeller.
Outboard engine is mounted too high or too low - Position the engine correctly.
Low engine oil level - Fill up the oil to required level.
Oil pump failure - Change oil pump.
Water intake screen is dirty - Wash or clean as required.
Incorrect valve setting - Adjust valves as required.
| Engine knocking sound or abnormal noise |
Low octane fuel - Use proper gasoline.
Excessive engine load - Load reducing is recommended.
Incorrectly set low idle speed - Adjust the low idle speed.
Fuel pump is defective or dirty - Test fuel pump and change if necessary.
Main bearings or crankshaft wear - Have bearings or crankshaft replaced.
Cylinder bore or piston rings are worn - Replace faulty components.
Clogged fuel lines - Fuel lines must be clean.
Damaged fuel injector - Install new fuel injector.
Dirty or faulty fuel pump - Inspect fuel pump and change as required.
Ignition system problems - Inspect ignition system and change faulty parts.
Damaged cylinder head gasket - Install new head gasket.
Faulty powerhead parts - Replace defective parts as required.
Valves are burned or stuck - Change or service valves.
Incorrect propeller selection - Replace propeller.
Propeller bent or damaged - Replace propeller.
Engine mounted at wrong transom height - Check the outboard motor mounting height.
Trim angle is incorrect - Adjust trim angle.
Fuel injector is dirty or worn - Replace or clean if necessary.
Loose or faulty spark plug - Tighten or replace spark plug.
Worn sleeve, piston, or rings - Replace defective components.
ECU is faulty - Install new ECU.
| Engine vibrates excessively |
Damaged or bent propeller - Replace propeller.
Damaged propeller shaft - Propeller shaft needs to be replaced.
Weeds wraped around propeller - Remove weeds from propeller.
Engine mounting bolt is not tightened - Tighten the bolt as required.
Steering pivot is loose or damaged Tighten or replace.
Low battery capacity - Low battery charging, charge as required.
Battery discharges quickly - Service battery or change it.
Corroded battery terminals or disconnected wires - Check battery wires and service or replace terminals.
Starter motor is damaged - Replace or repair starter.
| Trim motor is running but trim system cannot move up or down |
Oil insufficient - Check and refill oil.
Pump assembly is defective - Test pump and replace if necessary.
Manual shut-off valve leaks - Close the valve fully or replace it.
Motor or pump driveshaft faulty - Replace worn component.
| Trim does not fully up or down |
Pump assembly is defective - Change pump.
Tilt ram piston ball is displaced - Service or repair.
Tilt ram piston O-ring is worn - Change O-ring.
Lack of oil - Fill up oil.
Lower check valve not seating in port side trim ram - Install valve correctly.
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