Evinrude 120 V4 Troubleshooting
| Engine Model: Evinrude 120 V4 |
| Engine Type: 2-stroke 4-cylinder gasoline outboard engine |
| Total Displacement: 110 cu.in (1.8 L) |
| Rated Engine Power: 120 Hp (89 kW) at 5500 rpm |
| Fuel System: Carburetors or electronic fuel injection (EFI) |
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| Engine is not starting or hard starting |
Empty fuel tank - Add gasoline.
Improper fuel grade - Use quality fuel.
Air in the fuel system - Air bleeding.
Spark plug wire is disconnected or loose - Inspect the spark plug wire connection, replace or repair.
Spark plug is damaged - Change spark plug as required.
Fuel filter is dirty - Install new filter.
Fuel lines are dirty - Fuel lines must be clean.
Low fuel pressure - Check low pressure fuel pump or check system for fuel leaks.
Low air pressure - Inspect air system for leaks.
Bad harness connections - Inspect harness connections.
Ignition system is damaged - Replace defective components.
Fuel feed pump is faulty - Replace fuel feed pump.
Damaged or clogged fuel injector - Replace or clean as required.
ECM is not functioning - Install new ECM.
Worn or defective reed valve - Replace reed valve as required.
| Engine stops after starting |
Spark plug is faulty - Change spark plug as required.
Damaged ignition coil - Replace ignition coil as necessary.
Pulse pump is defective - Install new fuel pump.
Fuel system clogging - Fuel system need to be cleaned.
Plugged fuel filter - Change fuel filter.
Defective ignition system - Check ignition system and replace faulty parts.
Spark plug is defective - Install new spark plug.
Dirty or faulty fuel pump - Inspect fuel pump and change as required.
Low air pressure - Normalize air pressure.
Restricted fuel lines - Fuel lines must be clean.
Fuel filter is plugged - Fuel filter needs changing.
Direct injector is faulty - Install new injector.
Engine is under excessive load - Reduce the load.
Ignition timing is wrong - Adjust ignition timing correctly.
Thermostat failure - Change thermostat as required.
Damaged water pump - Water pump need to be replaced.
Propeller pitch or diameter incorrect - Check the propeller size.
Propeller bent or damaged - Have propeller repaired or replaced.
Outboard motor is positioned too low or too high - Position the engine correctly.
Stale gasoline - Change fuel.
Excessive engine load - Load reducing is recommended.
Low idle speed setting is incorrect - Adjust idling as required.
Clogged or damaged fuel pump - Service or change fuel pump.
Main bearings or crankshaft wear - Replace crankshaft or bearings.
Damaged cylinder bore or piston rings - Change defective parts.
Fuel pump is damaged or dirty - Inspect fuel pump and change as required.
Ignition failure - Check ignition system and replace faulty parts.
Powerhead parts are faulty - Replace defective parts as required.
Low fuel pressure - Inspect low pressure fuel pump or inspect fuel system for leaks.
Low air pressure - Normalize air pressure.
Low compression - Normalize compression.
Fuel supply problem - Check and repair.
Fuel regulator leaks - Repair leaks.
Fuel filter is clogged - Change fuel filter.
Fuel injector is clogged or malfunction - Clean or install new injector.
Manifold is leaking - Repair leaks.
Propeller pitch or diameter incorrect - Install correct propeller.
Propeller bent or damaged - Replace propeller.
Engine mounted at wrong transom height - Adjust the engine to correct transom height.
Trim angle is incorrect - Adjust trim angle.
| Engine uses too much fuel |
Spark plug is loose or faulty - Change or re-tighten spark plug.
Worn piston, rings, or sleeve - Change defective parts.
Engine is overloaded - Reduce engine load.
Fuel injectors are defective or dirty - Clean or replace fuel injectors.
| Engine vibrates excessively |
Damaged or bent propeller - Replace propeller.
Propeller shaft malfunction - Replace propeller shaft.
Weeds in the propeller - Remove and clean propeller.
Motor mounting bolt is loose - Tighten bolt.
Loose or faulty steering pivot - Tighten correctly or replace.
| Starter motor is not working |
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 bolt.
| Trim motor runs but trim system does not move up or down |
Oil level is low - Check and refill oil.
Damaged pump assembly - Test pump and change if necessary.
Leakage of manual drain valve - Close the valve or change it.
Faulty pump driveshaft or motor - Replace defective component.
| Trim does not fully up or down |
Pump assembly is faulty - Change pump.
Tilt ram piston ball is displaced - Service or repair.
Tilt ram piston O-ring is worn - Replace O-ring.
Insufficient oil - Fill up oil to required level.
Lower check valve not seating in port side trim ram - Install valve correctly.
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| Outboard Engines Technical Specifications |
| Small Engines Technical Specifications |
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| Industrial Engines Technical Specifications |
