Mercury 200 L4 Verado Problems
| Engine Model: Mercury Verado 200 L4 |
| Engine Type: 4-stroke inline 4-cylinder supercharged gasoline outboard engine |
| Total Displacement: 105.8 cu.in (1.7 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 doesn't start or hard to start |
Fuel tank is empty - Add gasoline.
Wrong fuel grade - Use correct fuel grade.
Dirty fuel system - Check and clean.
Spark plug wire is loose or disconnected - Check spark plug wiring connection, repair or change.
Spark plug is damaged - Replace spark plug.
Plugged fuel filter - Replace fuel filter.
Worn or defective vapor separator needle valve - Install new needle valve.
Dirty fuel lines - Clean fuel lines.
Fuel tank air vent clogged or closed - Open or service air vent.
Fuel feed pump failure - Replace or repair fuel pump.
Choke cable is worn or not adjusted properly - Change cable or adjust properly.
Valve clearance is wrong - Check and adjust.
Improper valve timing - Adjust valve timing correctly.
Low fuel pressure - Inspect fuel system for leaks or inspect low pressure fuel pump.
Clogged or worn fuel injector - Replace or clean if necessary.
Fuel regulator is defective - Change fuel regulator.
ECM is not functioning - Change electronic control modul.
| Engine starts but stalls suddenly |
Spark plug is defective - Replace spark plug.
Worn or defective vapor separator needle valve - Install new needle valve.
Damaged ignition coil - Replace ignition coil as necessary.
Fuel tank air vent closed or restricted - Fuel tank air vent need to be opened or cleaned.
Faulty fuel pump - Change or rebuild fuel pump.
Faulty choke system - Change choke system components as required.
Excessive valve clearance - Check and adjust.
Incorrect valve timing - Set the valve timing properly.
Valve springs are weak or broken - Replace valve springs.
Valves sticking - Service the valves.
Poor cylinder compression - Check and change damaged parts.
Clogged fuel filter - Fuel filter needs changing.
Fuel injector is clogged or malfunction - Replace or clean as required.
Not enough engine oil - Add oil to the engine crankcase.
Oil pump is defective - Oil pump need to be replaced.
Water intake is clogged - Need to wash or clean.
Thermostat failure - Install new thermostat.
Water pump is defective - Water pump need to be replaced.
Ignition failure - Inspect ignition system and change failed components.
Clogged or damaged fuel pump - Service or change fuel pump.
Worn or damaged vapor separator needle valve - Change vapor separator needle valve.
Dirty fuel lines - Service fuel lines.
Fuel tank air vent closed or restricted - Open or service air vent.
Fuel filter is dirty - Install new filter.
Intake manifold is air leaking - Install new gasket.
Dirty water intake screen - Need to clean or wash.
Throttle valve and throttle link are defective or worn - Change faulty parts.
Damaged or clogged fuel injector - Clean or replace if necessary.
Engine overload - Reduce load.
Clogged fuel pump or fuel injector - Clean or replace as required.
Wrong ignition timing - Adjust ignition timing correctly.
Thermostat failure - Install new thermostat.
Defective water pump - Replace water pump.
Propeller pitch or diameter incorrect - Install correct propeller.
Damaged or bent propeller - Replace propeller.
Outboard motor is mounted too high or too low - Mount the motor as required.
Engine oil level is insufficient - Fill up the engine oil.
Faulty oil pump - Change oil pump.
Clogged water intake - Need to wash or clean.
Valve setting is wrong - Adjust valves as required.
| Engine knocking sound or abnormal noise |
Low octane gasoline - Change gasoline.
Engine overload - Reduce the load.
Too low idle RPM - Correct idle settings.
Fuel pump is clogged or faulty - Service or change fuel pump.
Main bearings or crankshaft failure - Repair or replace defective parts.
Worn piston rings or cylinder bore - Change faulty parts.
Fuel lines are clogged - Clean fuel system lines.
Fuel injector is fault - Check fuel injector and replace if necessary.
Fuel pump is damaged or dirty - Check fuel pump and change if required.
Defective ignition - Inspect ignition system and change failed components.
Worn cylinder head gasket - Change cylinder head gasket.
Powerhead components are worn - Replace defective components.
Valves are burned or stuck - Clean or replace valves.
Propeller pitch or diameter incorrect - Replace propeller.
Propeller bent or damaged - Have propeller repaired or replaced.
Motor mounted at incorrect height on transom - Check the outboard engine mounting height.
Incorrect trim angle - Make the correct trim angle adjustment.
| Engine using too much gasoline |
Fuel injector is clogged or malfunction - Clean or replace if necessary.
Spark plug is faulty or loose - Change or re-tighten spark plug.
Worn sleeve, piston, or rings - Replace faulty components.
Electronic control unit failure - Change electronic control unit.
| Excessive engine vibration |
Damaged or improper size of propeller - Replace propeller.
Damaged propeller shaft - Propeller shaft needs to be replaced.
Weeds wraped around propeller - Remove and clean propeller.
Engine mounting bolt is not tightened - Tighten the bolt as required.
Steering pivot is loose or damaged Tighten correctly or replace.
| Starter motor is not working |
Low battery voltage - Battery is drained, charge it.
Battery is draining quickly - Service battery or replace it.
Disconnected cables or faulty battery terminals - Connect wires properly or change terminals.
Starter motor is damaged - Starter should be changed.
| Trim motor is running but trim system cannot move up or down |
Oil level low - Need to add the oil.
Pump assembly is damaged - Check pump and replace if necessary.
Manual release valve leaking - Close the valve fully or replace it.
Pump driveshaft or motor damaged - Change worn component.
| Trim cannot be fully up or down |
Defective pump assembly - Change pump as required.
Tilt ram piston ball is in wrong position - Clean or repair.
Tilt ram piston O-ring is worn - Change O-ring.
Oil level low - Need to add the oil.
Lower check valve not seating in port side trim ram - Secure valve properly.
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