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Generac GH-426 Engine Engine

The Generac GH-426 is a 0.43 L 1-cylinder engine. It powers generator sets from Generac, including the G0070420. It holds 1.03 L (0.3 gal) of oil.

Also known as: Generac GH-426, GH-426

0.426 L
Displacement
1
Cylinders
1.03 L
Oil capacity

Engine specifications

Oil capacity1.03 L
Displacement0.426 L
Cylinders1

Generator sets powered by this engine

1
Generac G0070420

Common problems

15
  • DANGER 000001
  • Pièces mobiles. 000115
  • Engine will not crank.
    Cause: 1. Blown fuse. 2. Loose, corroded, or defective battery cables. 3. Defective starter contact. 4. Defective starter motor. 5. Discharged battery.
    Fix: 1. Correct short circuit condition by replacing 7.5 amp fuse in generator control panel. Contact an Independent Authorized Service Dealer (IASD) if fuse continues to blow. 2. Tighten, clean, or replace as necessary.* 3. *See #2. 4. *See #2. 5. Charge or replace battery.
  • Asphyxie. 000103
  • Yellow LED illuminated in any state. YELLOW
    Fix: Check the screen for additional information. Perform SERVICE A maintenance. Press ENTER to clear.
  • Wiring Error ALARM 2099
  • Voltage and Frequency Drop Excessively When Loads Are Applied
    Fix: TEST 14 - CHECK VOLTAGE AND FREQUENCY UNDER LOAD, BOTH LOW -> TEST 15 - CHECK FOR OVERLOAD CONDITION, NOT OVERLOADED -> GOOD -> IF RECONFIGURED TO LP GAS, VERIFY THAT PROPER PROCEDURE WAS FOLLOWED (REFER TO INSTALLATION MANUAL), GOOD -> OVERLOADED -> DISCONTINUE TESTING, REDUCE LOADS TO UNIT’S RATED CAPACITY, TEST 12 - CHECK STEPPER MOTOR CONTROL, GOOD -> BAD -> REPAIR OR REPLACE, LOOK FOR A SHORTED CONDITION IN A CONNECTED LOAD OR IN ONE OF THE LOAD CIRCUITS, GOOD -> TEST 7 - CHECK STATOR AC POWER WINDINGS, ENGINE CONDITION GOOD -> REPAIR OR REPLACE, BAD -> TEST 16 - CHECK ENGINE CONDITION, GOOD -> GO TO “PROBLEM 18 - ENGINE STARTS HARD AND RUNS ROUGH/LACKS POWER” SECTION 4.3
  • Unstable Voltage or Incorrect Output Which is Not Triggering a Shutdown
    Fix: TEST 1 - CHECK AC OUTPUT VOLTAGE, ERRATIC -> PROCEED TO PROBLEM 3
  • Undervoltage 1902
  • Surfaces chaudes. 000108
  • Stepper Overcurrent ALARM 2100
  • Seul un électricien formé et agréé devrait s’occuper du câblage et des connexions à l’appareil. 000155
  • Seul un technicien qualifié peut installer, utiliser et entretenir cet équipement. 000182
  • RPM Sensor ALARM 1501
  • Risque environnemental. 000228

Compiled from service & troubleshooting documentation across every generator set that uses the Generac GH-426.

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filtercambio de aceite y sustitución del filtro de aceite, filtro de aire y bujía—400 hr find
Fuel filtercambio de aceite y sustitución del filtro de aceite, filtro de aire y bujía—400 hr find
Oil filtercambio de aceite y sustitución del filtro de aceite, filtro de aire y bujía—400 hr find
Oilcambio de aceite y sustitución del filtro de aceite, filtro de aire y bujía—400 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 Generac GH-426?

The Generac GH-426 engine has an oil capacity of 1.03 liters.

What is the displacement of the Generac GH-426?

The Generac GH-426 has a displacement of 0.426 liters with 1 cylinders.

Which generators use the Generac GH-426 engine?

The Generac GH-426 powers 1 generator set(s), including Generac G0070420.

How often should you change the oil in the Generac GH-426?

The Generac GH-426 oil change interval is every 400 hours.

What is a common problem with the Generac GH-426 engine?

A commonly reported issue on generators using the Generac GH-426 is: DANGER.