Mercury 200 Optimax Troubleshooting
| Engine Model: Mercury Optimax 200 |
| Engine Type: 2-stroke 6-cylinder gasoline outboard engine |
| Total Displacement: 185 cu.in (3 L) |
| Rated Engine Power: 200 Hp (147 kW) at 5700 rpm |
| Fuel System: Direct fuel injection (DFI) |
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| Engine difficult to start or won't start |
Gas tank is empty - Add fuel.
Improper fuel grade - Use quality fuel.
Air in fuel tank - Bleed fuel tank.
Damaged spark plug wiring connection - Inspect spark plug wiring connection, change or repair.
Spark plug is damaged - Install new spark plug.
Plugged fuel filter - Replace fuel filter.
Restricted fuel lines - Fuel lines need to be cleaned.
Fuel pressure is low - Inspect fuel system for leaks or inspect low pressure fuel pump.
Low air pressure - Check air system components.
Damaged wiring harness connections - Check electrical wire harness connections.
Ignition system malfunction - Check ignition components and replace if necessary.
Faulty fuel feed pump - Install new fuel feed pump.
Clogged or worn fuel injector - Replace or clean as required.
Electronic control modul failure - Replace ECM.
Reed valve is worn or damaged - Install new reed valve.
| Engine stops after starting |
Faulty spark plug - Change spark plug.
Faulty ignition coil - Ignition coil should be replaced.
Faulty fuel pump - Fuel pump need to be replaced.
Fuel system is clogged - Fuel system need to be cleaned.
Fuel filter is plugged - Replace or clean filter.
Ignition failure - Inspect ignition system and change failed components.
Faulty spark plug - Spark plug need to be replaced.
Fuel pump is faulty or clogged - Check fuel pump and replace if necessary.
Air pressure is low - Normalize air pressure.
Restricted fuel lines - Fuel lines must be clean.
Fuel filter is dirty - Fuel filter needs changing.
Faulty direct injector - Replace if necessary.
Excessive engine load - Load reducing required.
Ignition timing is improper - Set the ignition timing correctly.
Thermostat is defective - Install new thermostat.
Damaged water pump - Water pump need to be replaced.
Propeller pitch or diameter incorrect - Replace propeller.
Damaged or bent propeller - Have propeller repaired or replaced.
Outboard motor is mounted too high or too low - Position the engine correctly.
| Abnormal engine knocking or noise |
Stale fuel - Change gasoline.
Engine overload - Load reducing is recommended.
Incorrectly adjusted low idle speed - Adjustment required.
Fuel pump is clogged or faulty - Check fuel pump and change if required.
Crankshaft or main bearings wear - Change or repair worn components.
Worn cylinder bore or piston rings - Change faulty components.
Clogged or damaged fuel pump - Check fuel pump and replace if necessary.
Ignition system failure - Inspect ignition system and change failed components.
Powerhead parts are damaged - Replace defective components.
Fuel pressure is low - Inspect fuel system for leaks or inspect low pressure fuel pump.
Air pressure is low - Check air system components.
Compression is insufficient - Correct it.
Fuel supply problem - Check and repair.
Fuel regulator is leaking - Leak must be repaired.
Fuel filter is plugged - Install new filter.
Fuel injector is faulty or clogged - Replace or clean as required.
Manifold is leaking - Repair leaks.
Propeller selection improperly - Check the propeller size.
Propeller bent or damaged - Have propeller repaired or replaced.
Outboard motor mounting height is set incorrectly - Check the outboard motor mounting height.
Incorrect trim angle - Adjust trim angle correctly.
| Engine using too much gasoline |
Faulty or loose spark plug - Tighten or change the spark plug.
Piston, sleeve, or rings are damaged - Replace faulty parts.
Excessive engine load - Load reducing required.
Clogged or defective fuel injectors - Check fuel injectors and change if required.
| Engine vibrates excessively |
Propeller bent or damaged - Have propeller repaired or replaced.
Damaged propeller shaft - Replace propeller shaft.
Weeds in the propeller - Remove and clean propeller.
Engine mounting bolt is not tightened - Tighten bolt.
Damaged or loose steering pivot - Tighten or replace.
Propeller bent or damaged - Have propeller repaired or replaced.
Propeller shaft malfunction - Replace propeller shaft.
Weeds in the propeller - Remove and clean propeller.
Engine mounting bolt is not tightened - Tighten the bolt as required.
| Trim motor runs but trim system does not move up or down |
Not enough oil - Need to add the oil.
Pump assembly is defective - Test pump and replace if necessary.
Leakage of manual drain valve - Valve need to be closed or changed.
Motor or pump driveshaft faulty - Change worn component.
| Trim cannot be fully up or down |
Pump assembly faulty - Change pump as required.
Tilt ram piston ball is displaced - Service or repair.
Tilt ram piston O-ring damaged - Install new O-ring.
Oil level is low - Check and refill oil.
Lower check valve is not properly secured in port side trim ram - Install valve correctly.
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