Yanmar 3TNE84 Troubleshooting
| Engine Model: Yanmar 3TNE84 |
| Engine Type: 4-cycle vertical 3-cylinder direct injection liquid-cooled diesel |
| Total Displacement: 91.3 cu.in (1.49 L) |
| Rated Engine Power: 38 Hp (28.3 kW) at 3600 rpm |
| Aspiration Type: Naturally aspirated |
____________________________________________________________________________________
| Engine starts hard or will not start |
Fuel filter plugging - Service or replace the filter.
Air in fuel tank - Bleed fuel tank.
Defective injection nozzle - Clean or replace injection nozzles.
Fuel injection pump is broken - Rebuild or change fuel pump.
Improper valve timing - Adjust or change timing gear.
Dirt in the fuel lines or hoses - Service or replace fuel pipes.
Wrong injection timing - Adjust as recommended.
Worn cylinder or piston rings - Change faulty parts.
| Engine starts and stalls suddenly |
Fuel filter element is clogged - Change filter element.
Fuel injection pump is not working correctly - Replacement or repair required.
Dirty air filter - Clean or change the filter.
Incorrect nozzle opening pressure - Set it correctly.
| Engine stalls after running |
Fuel injection timing is wrong - Adjust the pump as required.
Fuel filter element is clogged - Clean the filter element.
Coolant temperature is low - Warm up to required temperature.
Injection nozzles are stuck or clogged - Clean or replace injection nozzles.
| Engine stalls when idling |
Low idle speed setting is incorrect - Correct low idle settings.
Improper valve clearance - Correct valve clearance.
Fuel injection pump malfunctioning - Rebuild or install a new injection pump.
Dirty or faulty injection nozzles - Change fuel injection nozzles.
Fuel lines or hoses are clogged - Fuel lines and hoses need to be cleaned.
Air filter element clogged - Service or replace the air filter.
Damaged cylinder-head gasket - Cylinder-head gasket replacement required.
Injection timing is improper - Adjust according to specifications.
Faulty fuel injection pump - Install a new fuel pump or repair.
One of moving engine components has failed - Repair or replace defective components.
Dirty radiator core or defective radiator cap - Clean radiator or change cap.
Insufficient coolant - Add coolant fluid to cooling system and also check it for leaks.
Fan belt is loose or defective - Replace the fan belt.
Engine oil level is insufficient - Fill the crankcase with engine oil.
Cylinder-head gasket is broken - Cylinder-head gasket replacement required.
Incorrect injection timing - Adjust according to specifications.
Low crankcase oil level - Check and refill the oil.
Defective oil pump - Replace as required.
Oil filter is clogged - Service or replace engine oil filter.
Relief valve is defective or dirty - Change or clean relief valve.
Excessive crankshaft bearing clearance - Test and repair or replace worn parts.
Crankpin bearing clearance is excessive - Inspect and change or repair worn components.
Oil leaking: Seals or gaskets are defective - Install new components.
Oil viscosity is wrong - Fill up with the proper oil viscosity.
Damaged or seized piston rings - Install new piston rings.
Valve stems or guides are damaged - Need to replace the valves.
Scuffed pistons or cylinder liners - Check pistons and liners, change as required.
Engine not warmed up - Warm up engine as required.
Not enough engine oil - Checking oil level and add if necessary.
Improper fuel injection timing - Adjust the pump as required.
Scored or worn pistons - Have pistons replaced.
Connecting rod is defective or misaligned - Align or replace connecting rod.
Low battery voltage - Recharge the battery.
Battery will not hold charge - Service battery or change it.
Corroded battery terminals or disconnected wires - Check battery wires and service or replace terminals.
Battery is low or faulty - Recharge or replace battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Battery capacity is low - Battery is drained, charge it.
Starter motor failure - Repair or replace starter.
____________________________________________________________________________________
| Industrial Engines Technical Specifications |
| Small Engines Technical Specifications |
| Car Engines Technical Specifications |
| Outboard Engines Technical Specifications |
