Yamaha F60FET Troubleshooting
| Engine Model: Yamaha F60FET |
| Engine Type: 4-stroke inline 4-cylinder SOHC 8-valve gasoline outboard engine |
| Total Displacement: 60.8 cu.in (996 cc) |
| Rated Engine Power: 60 Hp (44.1 kW) at 5500 rpm |
| Fuel System: Electronic Fuel Injection (EFI) |
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| Engine will not start or starts up hard |
Empty gas tank - Add fuel.
Low-quality gasoline - Change fuel.
Air in the fuel system - Air bleeding.
Damaged spark plug wiring connection - Inspect spark plug wiring connection, change or repair.
Damaged spark plug - Spark plug need to be replaced.
Dirty fuel filter - Replace fuel filter.
Worn or damaged vapor separator needle valve - Install new needle valve.
Fuel lines are dirty - Service fuel lines.
Closed or clogged fuel tank air vent - Open or service air vent.
Damaged fuel feed pump - Replace or repair fuel pump.
Worn or unadjusted choke cable - Change cable or adjust properly.
Incorrect valve clearance - Adjust valve clearance.
Incorrect valve timing - Set the valve timing properly.
Low fuel pressure - Check low pressure fuel pump or check system for fuel leaks.
Fuel injector is faulty or clogged - Replace or clean if necessary.
Fuel regulator is faulty - Change fuel regulator.
ECM is not functioning - Install new ECM.
| Engine starts and stops immediately |
Spark plug is defective - Install new spark plug.
Vapor separator needle valve is worn or defective - Change vapor separator needle valve.
Damaged ignition coil - Replace ignition coil as necessary.
Closed or restricted fuel tank air vent - Open or service air vent.
Faulty fuel pump - Repair or change fuel pump.
Choke system malfunction - Check and repair choke system.
Valve clearance is wrong - Adjust to proper valve clearance.
Incorrect valve timing - Set the valve timing correctly.
Bad or damaged valve springs - Install new valve springs.
Valves sticking - Valves need to be cleaned.
Bad cylinder compression - Check and replace worn parts.
Fuel filter is clogged - Replace or clean fuel filter.
Fuel injector is faulty or clogged - Clean or install new injector.
Lack of engine oil - Check and refill engine oil.
Damaged oil pump - Change oil pump.
Water intake is blocked - Need to clean or wash.
Defective thermostat - Thermostat need to be replaced.
Damaged water pump - Replace water pump.
Ignition system malfunction - Check ignition system and replace faulty parts.
Clogged or defective fuel pump - Clean or install new fuel pump.
Vapor separator needle valve is damaged or worn - Replace needle valve.
Fuel lines are dirty - Clean fuel lines.
Closed or restricted fuel tank air vent - Open or service air vent.
Fuel filter is dirty - Fuel filter needs to be replaced.
Intake manifold air leaks - Install new gasket.
Water intake is blocked - Clean and wash as required.
Throttle link and throttle valve are worn or damaged - Change faulty parts.
Damaged or clogged fuel injector - Clean or install new injector.
Engine is under excessive load - Reduce load.
Clogged fuel pump or fuel injector - Clean or replace as required.
Incorrect ignition timing - Set the ignition timing properly.
Thermostat failure - Change thermostat as required.
Water pump is defective - Change water pump.
Incorrect propeller selection - Check the propeller size.
Propeller bent or damaged - Have propeller repaired or replaced.
Outboard motor is positioned too low or too high - Mount the motor as required.
Insufficient engine oil - Checking oil level and add if necessary.
Oil pump failure - Install new oil pump.
Water intake screen is dirty - Wash or clean as required.
Valve setting is improper - Valves needs to be set correctly.
Stale fuel - Use proper fuel.
Engine is under excessive load - Load reducing required.
Low idle speed set incorrectly - Need to adjust idle speed.
Dirty or damaged fuel pump - Clean or install new fuel pump.
Worn crankshaft or main bearings - Change or repair worn components.
Cylinder bore or piston rings are damaged - Change faulty parts.
| Engine power is insufficient |
Fuel lines are dirty - Service fuel lines.
Fuel injector is fault - Test fuel injector and replace if necessary.
Fuel pump is clogged or faulty - Test fuel pump and replace if necessary.
Ignition system malfunction - Check ignition and replace faulty components.
Worn cylinder head gasket - Install new cylinder head gasket.
Faulty powerhead components - Replace defective components.
Stuck or burned valves - Service or replace valves.
Propeller pitch or diameter incorrect - Replace propeller.
Propeller bent or damaged - Have propeller repaired or replaced.
Outboard motor mounting height is set incorrectly - Check the outboard motor mounting height.
Improper trim angle - Adjust trim angle correctly.
| Engine uses too much fuel |
Fuel injector is dirty or worn - Clean or install new injector.
Defective or loose spark plug - Spark plug need to be replaced or tightened.
Worn sleeve, piston, or rings - Replace defective components as required.
Electronic control unit is not operating - Install new ECU.
| Engine vibrates excessively |
Damaged or bent propeller - Replace propeller.
Propeller shaft malfunction - Replace propeller shaft.
Weeds clogs the propeller - Clean the propeller.
Motor mounting bolt is loose - Tighten the bolt as required.
Steering pivot is loose or damaged Tighten or replace.
Low battery capacity - Low battery charging, charge as required.
Battery is draining quickly - Service or replace the battery.
Disconnected wiring or bad battery terminals - Check cables and service or change terminals.
Starter motor failure - Repair or install a new starter.
| Trim motor is running but trim system cannot move up or down |
Low oil level - Checking oil level and add if necessary.
Pump assembly is defective - Check pump and change if required.
Manual shut-off valve leaks - Valve need to be closed or changed.
Broken motor or pump driveshaft - Replace worn component.
| Trim cannot be fully up or down |
Defective pump assembly - Change pump.
Tilt ram piston ball is displaced - Clean or repair.
Worn tilt ram piston O-ring - Change O-ring.
Lack of oil - Checking oil level and add if necessary.
Lower check valve not seating in port side trim ram - Install valve correctly.
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