Mercury 60 Jet Troubleshooting
| Engine Model: Mercury Jet 60 |
| Engine Type: 4-stroke inline 4-cylinder gasoline outboard engine |
| Total Displacement: 60.8 cu.in (995 cc) |
| Rated Engine Power: 60 Hp (45 kW) at 6000 rpm |
| Fuel System: Electronic Fuel Injection (EFI) |
____________________________________________________________________________________
| Engine doesn't start or difficult to start |
Empty fuel tank - Fill gasoline up.
Incorrect fuel grade - Change gasoline.
Air in the fuel system - Air bleeding.
Spark plug wire connection are damaged - Check spark plug wiring connection, repair or change.
Spark plug is defective - Change spark plug.
Fuel filter is dirty - Change fuel filter.
Vapor separator needle valve is worn or defective - Change vapor separator needle valve.
Clogged fuel lines - Clean fuel system lines.
Fuel tank air vent restricted or closed - Open or service air vent.
Defective fuel feed pump - Change or rebuild fuel feed pump.
Choke cable is damaged or not adjusted properly - Adjust correctly or replace the cable.
Excessive valve clearance - Adjustment procedure required.
Valve timing is wrong - Adjust valve timing as required.
Fuel pressure is low - Inspect low pressure fuel pump or inspect fuel system for leaks.
Dirty or faulty fuel injector - Replace or clean if necessary.
Fuel regulator is not operating - Replace fuel regulator.
Electronic control modul is not operating - Install new ECM.
| Engine starts and then stalls |
Defective spark plug - Change spark plug as required.
Vapor separator needle valve is bend or wear - Change vapor separator needle valve.
Ignition coil is faulty - Change ignition coil as required.
Fuel tank air vent clogged or closed - Open or service air vent.
Fuel pump is faulty - Replace or rebuild fuel pump.
Choke system is damaged - Change choke system components as required.
Improper valve clearance - Adjustment procedure required.
Valve timing is wrong - Adjust valve timing as required.
Valve springs are worn or loose - Install new valve springs.
Valves are stuck - Clean the valves.
Bad compression - Check and change damaged parts.
Fuel filter is dirty - Fuel filter needs to be replaced.
Fuel injector is damaged or dirty - Clean or install new injector.
Engine oil insufficient - Add oil to the engine crankcase.
Defective oil pump - Install new oil pump.
Dirty water intake screen - Wash or clean as required.
Thermostat is defective - Change thermostat.
Defective water pump - Change water pump as required.
Defective ignition - Check ignition and replace faulty components.
Dirty or faulty fuel pump - Test fuel pump and replace if necessary.
Vapor separator needle valve is bend or wear - Install new needle valve.
Restricted fuel lines - Clean fuel lines.
Fuel tank air vent restricted or closed - Open or service air vent.
Dirty fuel filter - Install new filter.
Intake manifold is air leaking - Change intake manifold gasket.
Water intake is clogged - Need to clean or wash.
Throttle valve and throttle link are damaged or worn - Replace faulty components.
Dirty or faulty fuel injector - Clean or replace as required.
Engine overload - Reduce load.
Clogged fuel pump or fuel injector - Replace or clean if necessary.
Incorrect ignition timing - Ignition timing needs to be adjusted correctly.
Damaged thermostat - Change thermostat.
Water pump malfunction - Change water pump as required.
Propeller pitch or diameter incorrect - Check the propeller size.
Propeller bent or damaged - Replace propeller.
Outboard engine is mounted too high or too low - Mount the motor as required.
Insufficient engine oil - Add oil to the engine crankcase.
Oil pump is defective - Replace oil pump.
Water intake screen is dirty - Wash or clean as required.
Valve setting is incorrect - Set the valves properly.
| Engine knocking sound or abnormal noise |
Low octane fuel - Use correct fuel.
Engine overload - Load reducing required.
Wrong adjustment of low idle speed - Need to adjust idle speed.
Fuel pump is damaged or dirty - Inspect fuel pump and change as required.
Crankshaft or main bearings are worn out - Have bearings or crankshaft replaced.
Damaged piston rings or cylinder bore - Change faulty parts.
Fuel lines are clogged - Fuel lines must be clean.
Damaged fuel injector - Inspect fuel injector and change as required.
Fuel pump is dirty or defective - Service or change fuel pump.
Ignition system is defective - Check ignition and replace faulty components.
Defective cylinder head gasket - Install new head gasket.
Damaged powerhead parts - Replace defective parts.
Valves are burned or stuck - Service or replace valves.
Incorrect propeller selection - Check the propeller size.
Damaged or improper size of propeller - Have propeller repaired or replaced.
Motor mounted at incorrect height on transom - Adjust the outboard motor height correctly.
Incorrect trim angle - Adjust trim angle correctly.
| Engine uses too much fuel |
Dirty or faulty fuel injector - Replace or clean if necessary.
Spark plug is faulty or loose - Spark plug need to be tightened or replaced.
Worn rings, piston, or sleeve - Replace defective parts as required.
ECU is faulty - Change electronic control unit.
Damaged or improper size of propeller - Replace propeller.
Damaged propeller shaft - Replace propeller shaft.
Weeds in the propeller - Clean the propeller.
Engine mounting bolt is not tightened - Tighten bolt.
Steering pivot is faulty or loose Tighten or replace.
Battery power is low - Battery is drained, charge it.
Battery is not holding charge - Service or change the battery.
Battery terminals are corroded or wires are disconnected - Connect wiring correctly or install new terminals.
Starter motor failing - Starter should be changed.
| Trim motor is running but trim system cannot move up or down |
Lack of oil - Checking oil level and add if necessary.
Defective pump assembly - Test pump and replace if necessary.
Manual release valve leaking - Close the valve fully or replace it.
Motor or pump driveshaft faulty - Change defective component.
| Trim does not fully up or down |
Pump assembly faulty - Replace pump.
Tilt ram piston ball is not positioned correctly - Clean or repair.
Tilt ram piston O-ring is worn - Change O-ring.
Oil insufficient - Fill up oil to required level.
Lower check valve not seating in port side trim ram - Install valve correctly.
____________________________________________________________________________________
| Outboard Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Industrial Engines Technical Specifications |
