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Cummins/Onan 1.4EGSAA Engine

The Cummins/Onan 1.4EGSAA is a 1.4 L 1-cylinder natural engine rated at 3600 rpm, producing up to 1400 kW. It powers generator sets from Cummins/Onan, including the 1.4 EGSAA. It holds 0.95 L (0.3 gal) of oil and 0.9 L (0.2 gal) of coolant.

Also known as: Onan 1.4EGSAA

1.4 L
Displacement
1
Cylinders
3600 rpm
Rated speed
1400 kW
Gross power
On this pageSpecsGenerator setsMaintenanceFAQ

Engine specifications

Oil capacity0.95 L
Coolant capacity0.9 L
Displacement1.4 L
Cylinders1
AspirationNatural
Rated speed3600 rpm
Gross power1400 kW

Common problems

7
  • UNIT RUNS THEN STOPS
    Fix: Add fuel. Add oil. Reduce oil level.
  • UNIT RUNS BUT SURGES
    Fix: Add fuel. Add oil. Reduce oil level.
  • NO AC OUTPUT VOLTAGE
    Cause: Open AC circuit breaker due to an overload
    Fix: Remove all loads, re-set circuit breaker, check tools or appliances being used for defects. Do not exceed generator set rated load specifications.
  • FAILS TO CRANK (ELECTRIC START MODELS)
    Cause: Low Battery, Bad battery connection, Oil is too heavy, Load is connected
    Fix: Check battery electrolyte level and charge. Clean and tighten all battery and cable connections. Replace with lighter oil. Always disconnect load while starting.
  • EXHAUSTING BLACK SMOKE
    Cause: Open DC circuit breaker due to an overload
    Fix: Remove all loads, reset circuit breaker, check for an overload or short circuit. Do not exceed generator set rated load specifications.
  • ENGINE WONT START
    Cause: Loose or worn spark plug lead, Faulty spark plug, Dirty fuel filter or generator set at too steep of an angle, Governor out of adjustment or lean fuel mix
    Fix: Check spark plug lead connection. Remove and clean or replace spark plug. Check fuel filter and generator set angle. Contact an Onan service center.
  • CRANKS SLOWLY (ELECTRIC START MODELS)
    Cause: Choke closed, Dirty air filter, Rich fuel mixture
    Fix: Open choke. Clean or replace air filter. Contact an Onan service center.

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan 1.4EGSAA.

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filterAir Filter—100 hr
Fuel filterFuel Filter—100 hr
Oil filterOil Filter—100 hr
BatteryBattery—500 hr
BeltBelt—500 hr
OilEngine Oil500.0 hours—500 hr
Spark plugSpark Plug—100 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Common questions

What is the oil capacity of the Cummins/Onan 1.4EGSAA?

The Cummins/Onan 1.4EGSAA engine has an oil capacity of 0.95 liters.

What is the displacement of the Cummins/Onan 1.4EGSAA?

The Cummins/Onan 1.4EGSAA has a displacement of 1.4 liters with 1 cylinders.

Which generators use the Cummins/Onan 1.4EGSAA engine?

The Cummins/Onan 1.4EGSAA powers 1 generator set(s), including Cummins/Onan 1.4 EGSAA.

How often should you change the oil in the Cummins/Onan 1.4EGSAA?

The Cummins/Onan 1.4EGSAA oil change interval is every 500 hours.

What is a common problem with the Cummins/Onan 1.4EGSAA engine?

A commonly reported issue on generators using the Cummins/Onan 1.4EGSAA is: UNIT RUNS THEN STOPS. Fix: Add fuel. Add oil. Reduce oil level..