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Honda GX 270 Engine

The Honda GX 270 is a 0.27 L 1-cylinder forced-air engine rated at 3600 rpm. It powers generator sets from Dewalt, Honda and SDMO, including the DXGN7200, GX270, HX 4000 and HX 4000 TB UK. It holds 1.16 L (0.3 gal) of oil.

Also known as: Honda GX 270

Part of the Honda GX270 engine family — 2 variants share parts & fitment.

0.27 L
Displacement
1
Cylinders
3600 rpm
Rated speed
1.16 L
Oil capacity

Engine specifications

Oil capacity1.16 L
Displacement0.27 L
Cylinders1
AspirationForced-air
Rated speed3600 rpm

Generator sets powered by this engine

6

Shared across brands: Dewalt, Honda, SDMO

Dewalt DXGN7200Honda GX270SDMO HX 4000SDMO HX 4000 TB UKSDMO HX 4000 UKSDMO HX 5000 T

How to read your Honda engine serial & model number →

Common problems

12
  • Engine does not start
    Cause: Fuel tank empty
    Fix: Fill fuel tank
  • Low or fluctuating discharge pressure
    Cause: Inadequate water supply
    Fix: Use larger I.D. size of hose and provide specified inlet water pressure and volume
  • Engine starts hard or loses power
    Cause: Dirt or water in fuel tank
    Fix: Drain and clean fuel tank
  • Detergent will not siphon into Low Pressure Detergent mode
    Cause: Strainer not completely submerged in solution
    Fix: Check, submerge if necessary
  • Engine runs erratically
    Cause: Carburetor out of adjustment
    Fix: See your John Deere dealer
  • No discharge at nozzle when trigger mechanism is squeezed
    Cause: Low pressure or no water supply
    Fix: Ensure hose is 5/8 in. inside diameter and incoming water supply is turned on
  • Water leaks from brass valve on pump
    Cause: Thermal Relief Valve opening to protect pump
    Fix: Do not run washer with gun trigger closed for more than 3 minutes; Trigger gun to close valve
  • Water flows from nozzle when trigger is released
    Cause: Gun malfunction
    Fix: DO NOT USE!! See your John Deere dealer
  • Water flows back into detergent container
    Cause: Detergent valve jammed, missing or corroded
    Fix: See your John Deere dealer
  • Pump oil is white or milky color
    Cause: Water in oil
    Fix: Change oil. Avoid directing water spray at pump
  • Oil leaking from pump
    Cause: Pump failed
    Fix: DO NOT USE!! See your John Deere dealer
  • Engine idles poorly
    Cause: Air filter element dirty
    Fix: Clean or

Compiled from service & troubleshooting documentation across every generator set that uses the Honda GX 270.

Maintenance schedule

ItemSpecCapacityPart #Interval
Air filter—100 hr
Fuel filterCheck—50 hr
Oil filterChange—20 hr
BatteryCheck-Clean—20 hr
BeltReplace as necessary.—
Coolant—300 hr
OilSAE 20W-401.1 l—
Spark plugCheck-Clean—20 hr

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

Recommended fluids

FluidGradeStandardAmbientCapacityNotes
Engine oilSAE 15W40Sold by SDMO in 0.5 L (RBH0,5) and 1 L (RBH1) bottles

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Parts cataloged across the Honda GX270 family

3
Part #DescriptionCategory
68660Generator SetGenerator set
30009010Pilot screwService part / kit
31ZH9600Spark arrester screenSpark plug

Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.

Aftermarket parts that fit this engine

25

Parts 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 oil capacity of the Honda GX 270?

The Honda GX 270 engine has an oil capacity of 1.16 liters.

What is the displacement of the Honda GX 270?

The Honda GX 270 has a displacement of 0.27 liters with 1 cylinders.

Which generators use the Honda GX 270 engine?

The Honda GX 270 powers 6 generator set(s), including Dewalt DXGN7200, Honda GX270, SDMO HX 4000, SDMO HX 4000 TB UK, SDMO HX 4000 UK.

What is a common problem with the Honda GX 270 engine?

A commonly reported issue on generators using the Honda GX 270 is: Engine does not start. Cause: Fuel tank empty. Fix: Fill fuel tank.