Mitsubishi K3A Troubleshooting
| Engine Model: Mitsubishi K3A |
| Engine Type: 4-cycle inline 3-cylinder naturally aspirated liquid-cooled diesel |
| Total Displacement: 46.7 cu.in (0.77 L) |
| Rated Engine Power: 16.5 Hp (12.3 kW) at 2600 rpm |
| Fuel System Type: Indirect injection |
____________________________________________________________________________________
| Engine hard to start or will not start |
Dirty fuel filter - Change filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles fault - Clean or replace injection nozzles.
Faulty fuel injection pump - Rebuild or replace pump.
Incorrect valve timing - Use correct valve timing adjustment.
Dirt in the fuel lines or hoses - Clean fuel pipes.
Wrong injection timing - Adjust as recommended.
Excessive wear of piston rings and cylinder - Replace defective parts.
| Diesel starts but stalls suddenly |
Fuel filter element is clogged - Change filter element.
Fuel injection pump is faulty - Install a new pump or rebuild.
Intake air restriction - Clean or replace element.
Improper nozzle opening pressure - Set it correctly.
| Engine shuts off suddenly during operation |
Improper setting of fuel injection pump timing - Adjust as recommended.
Fuel filter plugging - Change filter element.
Engine not warmed up - Normalize the temperature by warming up the engine.
Defective or stuck injection nozzles - Repair or change injection nozzles.
Low idle speed set incorrectly - Adjust low idling as recommended.
The valve clearance is incorrect - Adjust valve clearance according to specifications.
Fuel injection pump malfunction - Repair or install a new fuel pump.
Fuel injection nozzles are damaged or dirty - Replace injection nozzles.
Fuel hoses or lines clogging - Fuel lines and hoses need to be cleaned.
Plugged air filter - Change air filter element.
Cylinder-head gasket is leaking - Gasket should be replaced.
Incorrect injection timing - Use correct injection timing adjustment.
Fuel injection pump is defective - Rebuild or install a new injection pump.
One of moving engine components has failed - Replace or repair damaged components.
Radiator core is dirty or radiator cap is damaged - Clean radiator or change cap.
Low engine coolant - Refill to the correct level and inspect system for leaks.
Excessive wear of the fan belt - If necessary, replace the belt.
Engine oil insufficient - Need to add engine oil.
Cylinder-head gasket is leaking - Replace cylinder head gasket.
Improper injection timing - Adjust injection timing as required.
| Insufficient oil pressure |
Not enough oil in the engine - Fill crankcase to proper oil level.
Oil pump malfunction - Repair or change.
Oil filter is clogged - Service or change engine oil filter element.
Relief valve is defective or dirty - Change or clean relief valve.
Excessive crankshaft bearing clearance - Inspect and change or repair worn components.
Clearance of crankpin bearing is excessive - Check and change or repair defective parts.
| Diesel engine using too much oil |
External oil leaks: Seals or gaskets are defective - Change to repair leaks.
Improper oil viscosity - Use oil of proper viscosity.
Piston rings are defective or worn - Change piston rings.
Damaged valve stems or valve guides - Replace defective valves.
Scuffed pistons or cylinder liners - Check liners and pistons, replace as required.
Engine is not preheated - Warm up to required temperature.
Engine oil level is insufficient - Checking oil level and add if necessary.
Incorrect adjustment of fuel injection pump timing - Adjust according to specifications.
Pistons are scored or worn - Have pistons replaced.
Connecting rod is not aligned or defective - Connecting rod needs to be aligned or changed.
Low battery output voltage - Battery is drained, charge it.
Battery won’t hold charge - Service charging system or replace battery.
Battery cables are disconnected or terminals are faulty - Connect wires correctly or change terminals.
Battery is drained or defective - Charge or change the battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery voltage - Battery is drained, recharge it.
Defective starter motor - Repair or install a new starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Car Engines Technical Specifications |
| Small Engines Technical Specifications |
| Outboard Engines Technical Specifications |
