Honda GX630 Engine
The Honda GX630 is a 0.07 L 1-cylinder forced-air engine rated at 3600 rpm, producing up to 14.1 kW. It powers generator sets from Dewalt and Honda, including the DXGN14000 and EB10000.
Also known as: Honda GX630
Engine specifications
| Coolant capacity | 0.0 L |
|---|
| Displacement | 0.0688 L |
|---|
| Cylinders | 1 |
|---|
| Aspiration | Forced-air |
|---|
| Rated speed | 3600 rpm |
|---|
| Gross power | 14 kW |
|---|
Common problems
14- Engine will not start
Cause: Fuel valve lever OFF.
Fix: Turn lever ON (see page 29). - No power at the AC receptacles
Cause: Air filter restricted
Fix: Clean or replace air filter (see pages 44, 68) - Engine lacks power
Cause: Air filter restricted.
Fix: Clean or replace air filter (see pages 51, 52, 53). - Failed to read out accumulated hours
Fix: Contact an authorized Honda Power Equipment dealer - Engine automatically stop and the FAULT/CO SENSOR LIFE indicator flashing
Cause: CO sensor malfunction
Fix: If the engine cannot be started and the CO ALARM indicator flashes, even if the location of the generator has changed, there may be a CO-MINDER malfunction. Consult an authorized Honda Power Equipment dealer - ROM/RAM failure — Engine stops E-32
Fix: Contact an authorized Honda Power Equipment dealer - Oil Alert indicator comes on and engine automatically stops (i-Monitor shows "OIL")
Cause: Crankcase oil level falls below a safe limit
Fix: Check the engine oil level; turn the engine switch to the OFF position, add the proper amount of oil, and then turn the engine switch back to the ON position to reset the Oil Alert indicator - High AC voltage — Engine stops E-31
Fix: Contact an authorized Honda Power Equipment dealer - FET overheat — Generator stops E-33
Fix: Contact an authorized Honda Power Equipment dealer - FAULT/CO SENSOR LIFE indicator flashing when running the engine
Cause: CO sensor may reach the end of its useful lifespan (see page 26)
Fix: Consult an authorized Honda Power Equipment dealer for replacement - Engine over rev — Engine stops E-04
Fix: Contact an authorized Honda Power Equipment dealer - Engine automatically stop and the CO ALARM indicator flashing
Cause: CO concentration around the generator is high
Fix: Review the location of the generator, and place it in a well-ventilated outdoor location (see page 25); When the engine is stopped automatically by CO-MINDER, press the CO-MINDER reset button to restart the engine (see page 52) - Contact an authorized Honda generator dealer. Communication error
- Communication error
Fix: Contact an authorized Honda Power Equipment dealer
Compiled from service & troubleshooting documentation across every generator set that uses the Honda GX630.
Service specifications
2| Type | Item | Value | Unit | Condition |
|---|
| Speed | Engine speed protection limit (DAVR self-diagnosis) | 4140 | rpm | abnormal voltage/speed sustained longer than 3 seconds |
| Voltage | Voltage regulation stability (DAVR) | within 1 | % | standard operation |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Aftermarket parts that fit this engine
38Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Common questions
What is the displacement of the Honda GX630?
The Honda GX630 has a displacement of 0.0688 liters with 1 cylinders.
Which generators use the Honda GX630 engine?
The Honda GX630 powers 3 generator set(s), including Dewalt DXGN14000, Honda EB10000, Honda GX630.
What is a common problem with the Honda GX630 engine?
A commonly reported issue on generators using the Honda GX630 is: Engine will not start. Cause: Fuel valve lever OFF.. Fix: Turn lever ON (see page 29)..