Mercury 200 L6 Verado Problems
| Engine Model: Mercury Verado 200 L6 |
| Engine Type: 4-stroke inline 6-cylinder gasoline outboard engine |
| Total Displacement: 159 cu.in (2.6 L) |
| Rated Engine Power: 200 Hp (149 kW) at 6400 rpm |
| Fuel System: Sequential Multi-Point Electronic Fuel Injection (EFI) |
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| Engine starts up hard or doesn't start |
Empty gas tank - Fill gasoline up.
Improper fuel grade - Use quality gasoline.
Air in the fuel system - Air bleeding.
Damaged spark plug wiring connection - Inspect spark plug wiring connection, change or repair.
Spark plug is faulty - Install new spark plug.
Plugged fuel filter - Change fuel filter.
Damaged or wear vapor separator needle valve - Install new needle valve.
Clogged fuel lines - Fuel lines need to be cleaned.
Fuel tank air vent closed or restricted - Fuel tank air vent need to be opened or cleaned.
Defective fuel feed pump - Replace or rebuild fuel feed pump.
Throttle cable is damaged or adjusted incorrectly - Adjust correctly or change the cable.
Valve clearance is improper - Adjust valve clearance.
Valve timing is incorrect - Adjust valve timing as required.
Fuel pressure is low - Inspect fuel system for leaks or inspect low pressure fuel pump.
Dirty or faulty fuel injector - Replace or clean as required.
Fuel regulator is faulty - Change fuel regulator.
Electronic control modul failure - Replace ECM.
| Engine starts but then stalls |
Spark plug is faulty - Spark plug need to be replaced.
Damaged or wear vapor separator needle valve - Change vapor separator needle valve.
Defective ignition coil - Ignition coil must be replaced.
Fuel tank air vent clogged or closed - Open or clean air vent.
Fuel pump is faulty - Replace or rebuild fuel pump.
Damaged choke system - Inspect and replace choke system components.
Incorrect valve clearance - Check and adjust.
Incorrect valve timing - Adjust valve timing as required.
Worn or loose valve springs - Valve springs need to be changed.
Stuck valves - Service the valves.
Bad compression - Check and replace worn parts.
Plugged fuel filter - Fuel filter needs to be replaced.
Dirty or faulty fuel injector - Replace or clean as required.
Not enough engine oil - Checking oil level and add if necessary.
Oil pump is defective - Install new oil pump.
Water intake is blocked - Need to wash or clean.
Thermostat is defective - Replace thermostat.
Defective water pump - Install new water pump.
Ignition system failure - Test ignition and replace failed parts.
Clogged or defective fuel pump - Check fuel pump and replace if necessary.
Damaged or wear vapor separator needle valve - Change vapor separator needle valve.
Fuel lines are clogged - Service fuel lines.
Fuel tank air vent restricted or closed - Open or clean air vent.
Fuel filter is dirty - Change fuel filter.
Intake manifold air leaks - Install new gasket.
Clogged water intake - Need to wash or clean.
Throttle link and throttle valve are worn or damaged - Change faulty components.
Fuel injector is clogged or malfunction - Clean or replace as required.
Engine overload - Reduce engine load.
Fuel injector or fuel pump is clogged - Clean or replace as required.
Wrong ignition timing - Ignition timing needs to be set properly.
Thermostat is defective - Change thermostat.
Water pump malfunction - Water pump need to be replaced.
Improper propeller diameter or pitch - Install correct propeller.
Damaged or improper size of propeller - Replace propeller.
Outboard engine is mounted too high or too low - Position the engine correctly.
Low engine oil level - Add oil to the engine crankcase.
Defective oil pump - Install new oil pump.
Water intake is clogged - Wash or clean as required.
Wrong valve setting - Valves needs to be set correctly.
| Engine knocking sound or abnormal noise |
Low octane gasoline - Use correct fuel.
Engine overload - Reduce engine load.
Incorrect low idle setting - Test and adjust.
Fuel pump is damaged or dirty - Inspect fuel pump and change as required.
Main bearings or crankshaft failure - Crankshaft or bearings need to be replaced.
Damaged piston rings or cylinder bore - Change defective parts.
Fuel lines clogging - Service fuel lines.
Faulty fuel injector - Inspect fuel injector and change as required.
Fuel pump is dirty or defective - Inspect fuel pump and change as required.
Ignition system is defective - Check ignition system and replace faulty parts.
Blown cylinder head gasket - Change cylinder head gasket.
Powerhead parts are worn out - Change defective components.
Valves are stuck or burned - Clean or change valves.
Propeller pitch or diameter incorrect - Replace propeller.
Propeller bent or damaged - Have propeller repaired or replaced.
Motor mounted at incorrect height on transom - Have motor adjusted to proper transom height.
Incorrect trim angle - Adjust trim angle correctly.
Fuel injector is clogged or malfunction - Replace or clean as required.
Faulty or loose spark plug - Spark plug need to be tightened or replaced.
Worn rings, piston, or sleeve - Replace defective parts as required.
ECU is faulty - Install new ECU.
| Excessive motor vibration |
Damaged or improper size of propeller - Have propeller repaired or replaced.
Propeller shaft malfunction - Replace propeller shaft.
Weeds wraped around propeller - Remove weeds from propeller.
Motor mounting bolt is loose - Tighten the bolt as required.
Damaged or loose steering pivot Tighten or replace.
| Starter motor is not working |
Low battery output - Charge the battery.
Battery drains quickly - Service battery or change it.
Wires are disconnected or battery terminals are corroded - Connect wiring properly or install new terminals.
Starter motor failure - Starter needs to be changed.
| Trim motor is running but trim system cannot move up or down |
Oil insufficient - Check oil level and add oil as required.
Defective pump assembly - Check pump and replace if necessary.
Manual shut-off valve leaks - Valve need to be closed or changed.
Broken motor or pump driveshaft - Change defective component.
| Trim cannot be fully up or down |
Pump assembly is defective - Replace pump.
Tilt ram piston ball is in wrong position - Service or repair.
Tilt ram piston O-ring is worn - Replace O-ring.
Lack of oil - Check and refill oil.
Lower check valve not seating in port side trim ram - Secure valve properly.
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