Mercury Racing 600R Troubleshooting
| Engine Model: Mercury Racing 600R |
| Engine Type: 4-stroke 12-cylinder DOHC 48-valve gasoline outboard engine |
| Total Displacement: 461 cu.in (7.6 L) |
| Rated Engine Power: 600 Hp (448 kW) at 6400 rpm |
| Fuel System: Sequential Multi-Point Electronic Fuel Injection (EFI) |
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| Engine starts hard or won't start |
Gas tank is empty - Add gasoline.
Low-quality gasoline - Use quality gasoline.
Dirty fuel lines - Inspect and clean.
Loose or disconnected spark plug wire - Inspect the spark plug wire connection, replace or repair.
Defective spark plug - Replace spark plug.
Fuel filter is plugged - Replace or clean fuel filter.
Worn or damaged vapor separator needle valve - Install new needle valve.
Clogged fuel lines - Clean fuel lines.
Fuel tank air vent restricted or closed - Open or service air vent.
Fuel feed pump is faulty - Replace or repair fuel pump.
Worn or improperly adjusted choke cable - Change cable or adjust properly.
Valve clearance is wrong - Check and adjust.
Valve timing is incorrect - Adjust valve timing as required.
Low fuel pressure - Check system for fuel leaks or check low pressure fuel pump.
Fuel injector is clogged or malfunction - Replace or clean if necessary.
Fuel regulator is faulty - Replace fuel regulator.
Electronic control modul failure - Replace ECM.
| Engine stops after starting |
Spark plug is damaged - Change spark plug.
Worn or damaged vapor separator needle valve - Replace needle valve.
Ignition coil is faulty - Replace ignition coil as necessary.
Closed or clogged fuel tank air vent - Open or service air vent.
Defective fuel pump - Install new fuel pump or rebuild it.
Damaged choke system - Inspect and replace choke system components.
Incorrect valve clearance - Check and adjust.
Wrong valve timing - Adjust valve timing as required.
Bad or broken valve springs - New valve springs need to be installed.
Valves sticking - Service the valves.
Bad cylinder compression - Check and change damaged parts.
Plugged fuel filter - Install new filter.
Damaged or clogged fuel injector - Clean or install new injector.
Not enough engine oil - Check oil level and add oil as required.
Oil pump malfunction - Oil pump need to be replaced.
Clogged water intake - Need to wash or clean.
Thermostat failure - Thermostat need to be replaced.
Water pump malfunction - Change water pump.
Ignition system problems - Check ignition and replace faulty components.
Fuel pump is clogged or faulty - Test fuel pump and change if necessary.
Vapor separator needle valve is worn or defective - Replace needle valve.
Fuel lines clogging - Clean fuel lines.
Closed or clogged fuel tank air vent - Open or clean air vent.
Fuel filter is dirty - Replace or clean fuel filter.
Intake manifold air leaks - Replace intake manifold gasket.
Water intake is clogged - Clean and wash as required.
Throttle link and throttle valve are worn or damaged - Change faulty components.
Dirty or faulty fuel injector - Clean or replace if necessary.
Engine is overloaded - Load reducing is recommended.
Fuel injector or fuel pump is clogged - Replace or clean if necessary.
Ignition timing is improper - Set the ignition timing properly.
Defective thermostat - Replace thermostat.
Water pump malfunction - Replace water pump.
Propeller pitch or diameter incorrect - Replace propeller.
Damaged or bent propeller - Have propeller repaired or replaced.
Outboard engine is mounted too high or too low - Mount the motor as required.
Engine oil level is insufficient - Fill up the oil to required level.
Oil pump malfunction - Oil pump need to be replaced.
Dirty water intake screen - Clean and wash as required.
Incorrect valve setting - Valves needs to be set correctly.
Stale fuel - Change fuel.
Engine is running overloaded - Reduce load.
Incorrectly adjusted low idle speed - Adjustment required.
Clogged or damaged fuel pump - Check fuel pump and change if required.
Crankshaft or main bearings failure - Install new parts as as required.
Worn piston rings or cylinder bore - Replace faulty parts.
| Engine power is insufficient |
Fuel lines are dirty - Service fuel lines.
Fuel injector is defective - Inspect fuel injector and change as required.
Fuel pump is clogged or faulty - Inspect fuel pump and change as required.
Ignition system is defective - Inspect ignition system and change failed components.
Worn cylinder head gasket - Replace the gasket as required.
Faulty powerhead components - Replace defective components as required.
Valves are stuck or burned - Service or replace valves.
Propeller selection improperly - Replace propeller.
Damaged or bent propeller - Have propeller repaired or replaced.
Engine mounted at wrong transom height - Adjust the outboard motor height correctly.
Trim angle is incorrect - Adjust trim angle correctly.
| Engine using too much gasoline |
Dirty or faulty fuel injector - Clean or replace if necessary.
Loose or defective spark plug - Spark plug need to be tightened or replaced.
Worn sleeve, rings, or piston - Replace defective components as required.
Electronic control unit failure - Change electronic control unit.
Propeller bent or damaged - Replace propeller.
Damaged propeller shaft - Replace propeller shaft.
Weeds wraped around propeller - Remove weeds from propeller.
Engine mounting bolt is not tightened - Tighten bolt.
Steering pivot is loose or damaged Tighten correctly or replace.
Low battery output voltage - Recharge the battery.
Battery is draining quickly - Service or replace the battery.
Disconnected wires or corroded battery terminals - Connect cables correctly or replace terminals.
Damaged starter motor - Starter should be replaced.
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