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Kohler CH 440 Engine

The Kohler CH 440 is a 0.43 L air-cooled engine rated at 3600 rpm. It powers generator sets from Kohler and SDMO, including the 14RES, PERFORM 6500, PERFORM 6500 GAZ TB UK and Perform 6500 XL. It holds 1.1 L (0.3 gal) of oil.

Also known as: Kohler CH 440, CH440

Part of the Kohler CH440 engine family — 2 variants share parts & fitment.

0.429 L

Displacement

3600 rpm

Rated speed

1.1 L

Oil capacity

On this pageSpecs Generator sets FAQ Service intervals Torque & specs Fluids Fault codes Procedures Wiring

Engine specifications

Oil capacity	1.1 L
Displacement	0.429 L
Aspiration	Air-cooled
Rated speed	3600 rpm

Generator sets powered by this engine

Shared across brands: Kohler, SDMO

Kohler 14RES SDMO PERFORM 6500SDMO PERFORM 6500 GAZ TB UKSDMO Perform 6500 XLSDMO TECHNIC 6500 UKSDMO WELDARC 220 T

How to read your Kohler engine serial & model number →

Common problems

Generator set stops suddenly
Cause: Low oil pressure shutdown
Fix: Check for oil leaks. Check the oil level and add oil if necessary
The generator set cranks but does not start, starts hard, lacks power, or operates erratically
Cause: Air cleaner clogged
Fix: Clean and/or replace the air cleaner
The generator set does not crank
Cause: Battery weak or dead
Fix: Recharge or replace the battery
No AC output
Cause: Line circuit breaker in the OFF position
Fix: Place the circuit breaker in the ON position
Overcrank fault
Cause: Generator set does not start in three crank attempts (three crank cycles, 15 seconds crank and 15 seconds off)
Underspeed, underfrequency, or undervoltage fault
Cause: Enclosure thermostat tripped due to excess heat inside the enclosure
Fix: Check for blocked air inlets and exhaust outlets; Reset the thermostat
MainPwrOverL Shutdown — controller internal circuit protection activated MainPwrOverL Shutdown
Fix: Press OFF to reset; Contact an authorized Kohler distributor/dealer for service
MainPwrOverL Shutdown MainPwrOverL Shutdown
Cause: Controller internal circuit protection activated
Fix: Press OFF to reset; Contact an authorized Kohler distributor/dealer for service
Low output or excessive drop in voltage
Cause: Generator set overloaded
Fix: Reduce the load
Generator will shut down and the controller will display a fault (underspeed, underfrequency, or undervoltage)
Cause: Thermostat detects excess heat inside the enclosure; blocked air inlets and exhaust outlets
Fix: Check for blocked air inlets and exhaust outlets; reset the thermostat
Emerg Stop Shutdwn Emerg Stop Shutdwn
Cause: Remote emergency stop button activated or shutdown (prime mover) switch turned to the off (open, O) position
Fix: Reset the remote emergency stop switch(es) and reset the controller by pressing the OFF/RESET button; Press I on the shutdown switch to allow the engine to start and run
Controller display is off
Cause: Low or no battery voltage
Fix: Check connections; Check generator set battery
Controller display backlight is off
Cause: Backlight turns off after about 1 minute with no activity
Fix: Backlight will turn on when a button is pressed or the generator set starts
Communication Lost with Secondary Controller LossOfComm2
Battery short circuits
Fix: Disconnect the battery before generator set installation or maintenance. Remove all jewelry before servicing the equipment. Use tools with insulated handles. Remove the negative (-) lead first when disconnecting the battery. Reconnect the negative (-) lead last when reconnecting the battery.

Compiled from service & troubleshooting documentation across every generator set that uses the Kohler CH 440.

Service intervals

Item	Action	Hours	Months	Notes
Oil level	Check	8 hr		Before each use or every 8 hours for extended operation
Engine oil	Change	100 hr	12 mo	14 kW models: 100 hours; 20 kW models: 150 hours
Oil (14 kW)	Change	100 hr	12 mo
Air cleaner	Replace	150 hr		300 hours shown; service more frequently under dusty/dirty conditions
Air cleaner service	Clean	150 hr	12 mo	14 kW: 150/300 hours; 20 kW: 150/300 hours yearly
Change oil	Change	150 hr	12 mo	20 kW models
Oil (20 kW)	Change	150 hr	12 mo
Oil cooler	Clean	150 hr	12 mo	20 kW models
Oil cooler	Inspect	150 hr	12 mo	20 kW models
Oil filter (20 kW)	Replace	150 hr	12 mo
Replace filter	Replace	200 hr	12 mo	20 kW models
Spark plugs	Check	150 hr		20 kW models
Oil filter	Replace	200 hr	12 mo	14 kW models: 200 hours; 20 kW models: 150 hours
Oil filter (14 kW)	Replace	200 hr	12 mo
Air cleaner service	Replace	300 hr		14 kW models
Brushes and collector ring	Inspect	300 hr	12 mo	14 kW models; authorized distributor/dealer only
Generator brushes and collector ring	Replace	300 hr	12 mo	Authorized distributor only
Spark plugs	Replace	300 hr	12 mo	150-300 hours shown
Crankcase breather hose	Check	500 hr	12 mo	14 kW models
Crankcase breather hose	Inspect	500 hr	12 mo	Yearly or 500 hours
Replace stepper motor coupling and bushing	Replace	500 hr		14 kW models; authorized distributor/dealer only
Wire-cable insulation condition	Inspect	500 hr	36 mo	14 kW models; 3 years or 500 hours
Air ducts and louvers	Clean		12 mo
Air ducts, louvers	Clean		12 mo	14 kW models
Air ducts, louvers	Inspect		12 mo	14 kW models
Battery	Check		1 mo	Check charger operation, charge rate
Battery electrolyte level and specific gravity	Check		12 mo	14 kW models; not necessary for maintenance-free batteries
Check battery charger operation, charge rate	Check		1 mo	14 kW models
Clean and tighten battery terminals and inspect boots	Clean		12 mo	14 kW models; inspect boots
Flexible lines and connections	Inspect		3 mo	14 kW models; replace as necessary
Fuel flexible lines and connections	Inspect		3 mo	Quarterly; replace as necessary
Fuel piping	Inspect		12 mo	Yearly
Fuel regulator vent tubes, if equipped	Clean		12 mo	20 kW models
Fuel regulator vent tubes, if equipped	Inspect		12 mo	20 kW models
Insulation, fire hazards	Inspect		12 mo	14 kW models
Interior of sound enclosure	Clean		3 mo	14 kW models
Interior of sound enclosure	Inspect		3 mo	14 kW models
Main tank fuel supply level	Check		0 mo	Weekly
Measure and record resistance readings of windings with insulation tester	Test		36 mo	14 kW models; authorized distributor/dealer only; Megger with SCR/rectifier and load leads disconnected
Remote control system, if equipped	Test		1 mo	14 kW models

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

Service specifications

Type	Item	Value	Unit	Condition
Gap	Spark plug	0.03	in.
Gap	Spark plug	0.76	mm
Gap	Spark plug gap	0.51	mm (0.02 in.)
Gap	Spark plug gap	0.7--0.8	mm (0.028--0.030 in.)
Gap	Spark plug gap	0.76	mm (0.03 in.)
Gap	Spark plug gap	0.8--0.9	mm (0.03--0.04 in.)
Gap	Spark plug gap	0.89	mm (0.035 in.)
Gap	Spark plug gap	0.9--1.0	mm (0.036--0.04 in.)
Other	Battery specific gravity, fully charged	1.260	specific gravity	at 80°F (26.7°C)
Other	Battery specific gravity, needs charging	below 1.215	specific gravity	at 80°F (26.7°C)
Other	Battery wrap length	1067 (42)	mm (in.)
Other	Battery wrap length	864 (34)	mm (in.)
Other	Heater wrap rating	50	Watts
Other	Heater wrap rating	65	Watts
Other	Maximum fuel flow rate, 14RES/RESL LP vapor	203000	Btu/hr
Other	Maximum fuel flow rate, 14RES/RESL natural gas	193000	Btu/hr
Other	Maximum fuel flow rate, 20RES/RESL LP vapor	340000	Btu/hr
Other	Maximum fuel flow rate, 20RES/RESL natural gas	281000	Btu/hr
Other	Plug cord length	75 (3)	mm (in.)
Other	Power cord length	1677 (66)	mm (in.)
Other	Power cord length	1830 (72)	mm (in.)
Other	Power cord length	483 (19)	mm (in.)
Pressure	Fuel supply pressure, LP vapor	1.7--2.7	kPa (7--11 in. H2O)
Pressure	Fuel supply pressure, natural gas	1.3--2.7	kPa (5--11 in. H2O)
Pressure	Gas fuel leak test pressure	6-8	ounces per square inch	10-14 inches water column
Pressure	LPG fuel supply pressure	1.7-2.7	kPa	at regulator inlet
Pressure	Natural gas fuel supply pressure	1.2-2.7	kPa	at regulator inlet
Speed	Engine governor speed setting 4P=00, 50 Hz	2850	rpm	4P setting 00
Speed	Engine governor speed setting 4P=00, 60 Hz	3420	rpm	4P setting 00
Speed	Engine governor speed setting 4P=50, 50 Hz	3000	rpm	4P setting 50
Speed	Engine governor speed setting 4P=50, 60 Hz	3600	rpm	4P setting 50
Speed	Engine governor speed setting 4P=99, 50 Hz	3150	rpm	4P setting 99
Speed	Engine governor speed setting 4P=99, 60 Hz	3776	rpm	4P setting 99
Temperature	Battery heater thermostat OFF	27	°C	80°F
Temperature	Battery heater thermostat ON	16-18	°C	60-65°F
Temperature	Breather tube heater thermostat OFF	13	°C	55°F
Temperature	Breather tube heater thermostat ON	4	°C	40°F
Temperature	Carburetor heater thermostat OFF	16 ±3	°C	14 kW models; 60 ±5°F
Temperature	Carburetor heater thermostat ON	4 ±3	°C	14 kW models; 40 ±5°F
Temperature	Carburetor heater thermostat ON	4 ±4	°C	20 kW models; 40 ±7°F
Temperature	Exhaust gas exiting enclosure at rated kW	260	°C (500 °F)	at rated kW
Temperature	Fuel regulator heater thermostat	4/13	°C	20 kW models; 40/55°F snap action
Temperature	Oil heater thermostat OFF	13	°C	55°F
Temperature	Oil heater thermostat ON	4	°C	40°F
Temperature	Thermostat off temperature	27	C (80 F)
Temperature	Thermostat on temperature	16	C (60 F)
Torque	Spark plug	18	ft. lb.
Torque	Spark plug	22	ft. lb.
Torque	Spark plug	24.4	Nm
Torque	Spark plug	24.4-29.8	Nm	14 and 20 kW models; also 18-22 ft. lb.
Torque	Spark plug	29.8	Nm
Torque	Spark plug torque	15	Nm (11 ft. lb.)
Torque	Spark plug torque	18	Nm (13.3 ft. lb.)
Torque	Spark plug torque	24.4--29.8	Nm (18--22 ft. lb.)
Torque	Spark plug torque	25	Nm (18 ft. lb.)
Voltage	DC2 built-in battery charger	14 ±2%	VDC	maximum 2.5 amps
Voltage	RDC2 built-in battery charger	13.4 ±2%	VDC	maximum 2.5 amps
Voltage	Voltage change per step, coarse, measured 180--360 VAC	7	VAC	1P00--99
Voltage	Voltage change per step, coarse, measured 85--180 VAC	5	VAC	1P00--99
Voltage	Voltage change per step, fine, measured 180--360 VAC	0.7	VAC	1P00--99

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

Recommended fluids

Fluid	Grade	Standard	Capacity	Notes
Engine oil	5W-30 or 10W-30	API Service Class SG, SH, or SJ synthetic	1.8 L	14 kW models; synthetic oil oxidizes and thickens less
Engine oil	SAE 15W40			Sold by SDMO in 0.5 L (RBH0,5) and 1 L (RBH1) bottles
Engine oil	Synthetic	API Service Class SG or higher		Use recommended viscosity and grade; fill if necessary.
Fuel		Natural gas or propane		Certified for emergency standby use only
Fuel	LP vapor	93 MJ/m3 (2500 Btu/ft3)		Fuel supply pressure 1.7--2.7 kPa (7--11 in. H2O). Max flow 14RES/RESL 203,000 Btu/hr; 20RES/RESL 340,000 Btu/hr.
Fuel	Natural gas	37 MJ/m3 (1000 Btu/ft3)		Fuel supply pressure 1.3--2.7 kPa (5--11 in. H2O). Max flow 14RES/RESL 193,000 Btu/hr; 20RES/RESL 281,000 Btu/hr.
Fuel	Natural gas or LPG			Generator set is certified for emergency standby operation only

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

Fault codes

Code	Name	Meaning	Severity	Action
AC Sens Loss	AC Sensing Lost	In Auto mode, generator output AC sensing is lost. Detection begins 10 seconds after crank disconnect.	Warning	Contact authorized distributor/dealer for service
Accy PwrOver	Accessory Power Overload	An over current fault (short circuit) on the accessory controller power output	Warning	Contact authorized distributor/dealer for service
Advanced Diagnostic	Advanced Diagnostic Active	Shutdown during reduced-speed portion of exercise; engine restarts, runs at full speed for 2 minutes, then stops and returns to AUTO.	Shutdown	If generator set does not restart and return to AUTO, check for other faults.
ATS ComError	ATS Communication Error	Warning is displayed if ATS interface connection is lost	Warning	Check communication wiring between transfer switch interface board and generator set
ATS PhaseRot	ATS Phase Rotation Mismatch	Transfer switch phase rotation does not match; ATS will not transfer	Warning	Correct the ATS connection per ATS Installation manual and labels
Aux Input	Auxiliary input	Optional customer-connected input is closed.	Shutdown	Check customer-supplied equipment.
Batt Chg Flt	Battery charger fault	Input to PIM from an external battery charger.	Warning	Check external battery charger.
Battery CrLo	Battery Crank Low	Engine starting battery voltage falls below 11 VDC for more than 10 seconds	Warning	Clears when battery voltage returns to acceptable level
Battery High	Battery voltage high	Engine starting battery voltage rises above 16 VDC for more than 10 seconds; inhibited during crank cycle.	Warning	Check battery rating and condition; check battery charger.
Battery Voltage Low	Battery voltage low	Engine starting battery voltage falls below 12.5 VDC for more than 90 seconds when engine is not running.	Warning	Check battery rating and condition; check battery charger; charge or replace battery.
Eng Speed High	Engine speed high	Engine speed exceeds 115% of normal running speed for more than 0.3 seconds.	Shutdown	Contact an authorized distributor/dealer for service.
Eng Speed Low	Engine speed low	Engine speed drops below 85% of normal running speed for more than 3 seconds.	Shutdown	Reduce load; check enclosure thermostat on 20RESC/20RESCL; contact distributor/dealer.
Exer Not Sch	Exercise not scheduled	No exercise is scheduled on the controller.	Warning	Set the exerciser.
Frequency High	Frequency high	Governed frequency exceeds 110% of system frequency setpoint for more than 10 seconds.	Shutdown	Contact an authorized distributor/dealer for service.
Frequency Low	Frequency low	Governed frequency falls below 90% of system frequency for more than 10 seconds or 1 Hz below for more than 60 seconds.	Shutdown	Reduce load and restart; check enclosure thermostat on 20RESC/20RESCL; contact distributor/dealer.
Lo Crank Vlt	Low cranking voltage	Battery voltage falls below 8 VDC for more than 6 seconds while starter is engaged.	Warning	Charge or replace battery.
Locked Rotor	No engine rotation during cranking	No engine rotation is sensed during cranking; shuts down 3 seconds after fault detected.	Shutdown	Check battery and loose connections; contact distributor/dealer.
Low Coolant Level	Low coolant level	Battery voltage supply issue; may also be triggered by low battery voltage on air-cooled models.	Warning	Verify utility power to TB1; check battery connections and condition.
MainPwrOverL	Main power overload	Over current fault on controller power output (short circuit).	Shutdown	Contact an authorized distributor/dealer for service.
NoEC	No engine configuration setting	Controller configuration is not set.	Warning	Set engine configuration (Ec) to match generator set engine type.
Not in Auto	Not in Automatic mode	Generator set is not in Automatic standby mode; remote start/stop commands ignored.	Warning	Press AUTO to place generator set in Automatic mode when appropriate.
Oil Press Low	Low oil pressure	LOP switch indicates low oil pressure for more than 5 seconds; active 30 seconds after crank disconnect.	Shutdown	Check for leaks; check oil level and add oil; check oil pressure switch and wiring.
Over Crank	Overcrank	Three unsuccessful starting attempts.	Shutdown	Check fuel supply, spark plug, and battery; check loose connections; contact distributor/dealer.
Spd Sens Flt	Speed sensor fault	Engine speed sensor has failed or engine stalled.	Shutdown	Contact an authorized distributor/dealer for service.
Uu----	Voltage and frequency not set	Controller displays Uu---- if voltage and frequency are not set to a standard combination.	Warning	Set system voltage and frequency parameter (Uu) to a standard combination.
Volts L1-L2 High	Generator voltage high	Output voltage exceeds 120% of system nominal voltage for more than 2 seconds.	Shutdown	Contact an authorized distributor/dealer for service.
Volts L1-L2 Low	Generator voltage low	Output voltage falls below 80% of nominal system voltage for more than 10 seconds.	Shutdown	Reduce load and restart; check enclosure thermostat on 20RESC/20RESCL; contact distributor/dealer.

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

Procedures

Frequency Adjustment, RDC Controller adjustment

⚠ Hazardous voltage.

⚠ Moving parts.

Tools: frequency meter

Attach frequency meter to AC output leads or load-side outlet.
Start and run generator at least 10 minutes to normal operating temperature.
Adjust engine governor speed (parameter 4P) to 60 Hz or 50 Hz as appropriate.
With no load, adjust governor gain (parameter 5P) until stable with no hunting or surging.
Check frequency; repeat steps 3 and 4 if necessary.
Save settings.

Fuel Conversion, 14RES/RESL (NG to LP) adjustment

⚠ Explosive fuel vapors.

⚠ Accidental starting.

Tools: dry cloth or brush, pipe sealant, gas leak detector

Press OFF and remove F3 fuse; disconnect battery charger.
Disconnect starting battery, negative lead first; turn off fuel supply.
Remove hose clamp and fuel hose from fuel block fitting.
Remove hose fitting from natural gas outlet port.
Remove plug from LP port.
Clean plug, apply fresh pipe sealant, install in natural gas port.
Clean hose fitting, apply fresh pipe sealant, install in LP port.
Slide hose onto fitting and secure with clamp.
Disconnect DSAI leads for LP near fuel solenoid valve.
Connect and turn on new fuel supply.
Reconnect battery, negative lead last; reconnect battery charger.
Install F3 fuse and start generator set with RUN button.
Check for leaks using a gas leak detector.
Run generator set and check operation; adjust output and stability if necessary.
Press OFF to shut down generator set.

Fuel Conversion, 20RES/RESL (NG to LP) adjustment

⚠ Explosive fuel vapors.

⚠ Accidental starting.

Tools: gas leak detector

Press OFF and remove F3 fuse; disconnect battery charger.
Disconnect starting battery, negative lead first; turn off fuel supply.
Remove hose clamp and fuel hose from hose fitting.
Insert LP orifice into hose fitting.
Slide hose onto fitting and secure with clamp.
Disconnect DSAI leads 65 and N5 for LP.
Connect and turn on new fuel supply.
Reconnect battery, negative lead last; reconnect battery charger.
Reinstall F3 fuse and start generator set with RUN button.
Check for leaks using a gas leak detector.
Run generator set and check operation; adjust output and stability if necessary.
Press OFF to shut down generator set.

RDC2 Voltage Calibration Using SiteTech adjustment

Tools: digital voltmeter, personal computer, SiteTech software

Connect PC to controller via USB
With generator off, connect multimeter across L1/L2 (AC volts)
Start generator set
Compare voltmeter reading to controller display
Calculate new Genset Calibration Factor Voltage using (Vmeter / Vcontrol) x Fold = Fnew
Enter new value into SiteTech and click Apply Changes
Verify voltmeter matches controller display
Repeat for L2-L3 and L3-L1 if three-phase
Press OFF to stop generator set

RDC2 Voltage Calibration Using the Controller Keypad adjustment

Tools: digital voltmeter

With generator off, connect digital multimeter across L1 and L2, set to AC volts
Start generator set with RUN button
Navigate to Generator Metering menu, press Select; Volts L1-L2 displayed
Press Select; voltage number flashes
Use up/down arrows to match voltmeter reading
Press Select to confirm
Step to Return screen
Press OFF to stop generator set

Resetting the Maintenance Timer adjustment

From Overview menu, step down to Genset Run Time menu.
Press Select button and step down to Next Maintenance screen.
Press Select button.
Press Up arrow button so 'Reset Maint Timer? Yes' is displayed.
Press Select button.
Wait about two minutes for new maintenance interval and date to display.

VSC Current (Load) Calibration Using the Controller Keypad adjustment

Tools: clamp-on DC current probe or DC current meter

Connect DC current probe/clamp meter to measure generator current
Start generator with RUN button
Adjust system voltage to obtain rated current output with battery bank attached (or use load bank)
Trip output breaker
Navigate to Generator Metering menu, select Generator Load
Press and hold Select for No-Load Calibration; verify breaker open, confirm Yes
Close output breaker; verify rated output current, confirm Yes
Verify displayed load is correct; recalibrate if necessary
Press OFF to stop generator set

Voltage Adjustment, RDC Controller adjustment

⚠ Hazardous voltage.

⚠ Moving parts.

Tools: digital multimeter

With generator off, connect digital multimeter to output leads or load-side outlet; set to AC voltage.
Start generator with RUN button.
Adjust parameter 1P until output voltage reaches desired value.
Adjust voltage stability (gain, parameter 2P) to minimize light flicker.
Readjust voltage if necessary.
Save settings.
Stop generator.

Clearing a Fault on the RDC2 Controller diagnostic

⚠ Correct cause of fault before resetting

While fault message is displayed, press Select to go to Overview menu.
Press Select again to display active fault message.
Press Select; Confirm Clear Fault: NO is displayed.
Press Down arrow; Confirm Clear Fault: YES is displayed.
Press Select to enter YES and clear fault.
Press Select to return to overview menu; controller changes to OFF mode.
Press AUTO to place generator set in automatic mode.

Battery Installation Procedure installation

⚠ Battery acid.

⚠ Explosion.

Remove controller fuse F3.
Ensure starting battery is fully charged.
Clean battery posts and/or adapters if necessary.
Install battery post adapters if needed.
Place battery in housing.
Connect positive (+) lead to battery.
Connect negative (--) lead to battery.
Install controller fuse F3.

Field-Connection Terminal Block Wiring installation

⚠ Hazardous voltage.

⚠ Backfeed to utility.

Drill holes for conduit fittings; feed cables through openings.
Connect transfer switch emergency source leads to L1 and L2 on terminal block.
Connect neutral (L0) and ground (GRD) from ATS and main panel.
For RRT transfer switch, connect interface panel to ATS1--ATS4 before connecting engine starting battery.
For RDT/RSB transfer switch or remote start/stop, connect engine start leads to terminals 3 and 4.
Connect utility power to terminals labelled Utility; source must be GFCI protected.

Air Cleaner Element and Precleaner maintenance

Disable set: press OFF button, disconnect battery charger power, remove battery cables, negative (--) lead first.
Loosen the cover retaining knob(s) or release the retaining clips and remove the cover.
Remove and discard the old air cleaner element and precleaner (if equipped).
Install the precleaner over the new air cleaner element.
Install the paper element onto the air cleaner base, making sure it is flat and properly seated.
Reinstall the element cover, element cover nut, and the air cleaner cover; secure with the knob(s) or clips.
15RES/30RES and RCL models: wipe cover and housing with a clean rag and make sure sealing surfaces fit correctly.
Reconnect the battery cable, negative (--) lead last.

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

Voltage reconnection

Voltage	Phase	Connection	Leads	Notes
		Model RDT/RSB transfer switch or remote start/stop	terminals 3 and 4	Route engine start leads through separate conduit from AC power and load leads.
		Model RRT transfer switch interface	ATS1--ATS4	Connect interface panel to ATS1--ATS4 before connecting engine starting battery.
		Utility power	Utility terminals	Connect to GFCI-protected circuit supplied by utility and backed up by generator.
100/200	1	Single
100/200	3	Delta
110/220	1	2F5 4-lead	4	Single-phase dual voltage
110/220	1	Single
110/220	3	Delta
115/230	1	Single
120	1	2F5 4-lead	4	Single-phase
120	1	Single		Genset System Voltage/Frequency/Phase table for controller setup
120/208	3	2G5 12-lead	12	Three-phase
120/208	3	Wye
120/240	1	2F5 4-lead	4	Single-phase dual voltage
120/240	1	Field-connection terminal block	L1, L2, L0, GRD	Connect transfer switch emergency source to L1 and L2; neutral L0 and ground GRD to corresponding points.
120/240	1	Single
120/240	3	Delta
127/220	3	Wye
220	1	Single
220/380	3	2G5 12-lead	12	Three-phase 50Hz
220/380	3	Wye
230	1	Single
230/400	3	Wye
240	1	Single
240/416	3	Wye
277/480	3	Wye

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

17-096-79 FridayParts $19.98 KuduParts $39.00 1740306-S FridayParts $68.08 1708321-S KuduParts $9.00 FridayParts $10.99 1788301S1 KuduParts $9.00 FridayParts $10.99 1708303S KuduParts $9.00

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 Kohler CH 440?

The Kohler CH 440 engine has an oil capacity of 1.1 liters.

What is the displacement of the Kohler CH 440?

The Kohler CH 440 has a displacement of 0.429 liters.

Which generators use the Kohler CH 440 engine?

The Kohler CH 440 powers 6 generator set(s), including Kohler 14RES, SDMO PERFORM 6500, SDMO PERFORM 6500 GAZ TB UK, SDMO Perform 6500 XL, SDMO TECHNIC 6500 UK.

What is a common problem with the Kohler CH 440 engine?

A commonly reported issue on generators using the Kohler CH 440 is: Generator set stops suddenly. Cause: Low oil pressure shutdown. Fix: Check for oil leaks. Check the oil level and add oil if necessary.