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ISM Diesel 1.0L Diesel Engine

The ISM Diesel 1.0L Diesel is a 0.95 L 3-cylinder engine rated at 1950 rpm, producing up to 9.7 kW. It powers generator sets from Generac, including the QUIETPACT 75. It holds 3.5 L (0.9 gal) of oil and 5.3 L (1.4 gal) of coolant.

Also known as: Ishikawajima Shibaura Machinery Co., Ltd. (ISM) 1.0L Diesel, 1.0L Diesel

0.954 L

Displacement

Cylinders

1950 rpm

Rated speed

9 kW

Gross power

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

Engine specifications

Oil capacity	3.5 L
Coolant capacity	5.3 L
Displacement	0.954 L
Cylinders	3
Rated speed	1950 rpm
Gross power	9 kW

Generator sets powered by this engine

Generac QUIETPACT 75

Common problems

The engine cranks but will not start
Cause: Vehicle fuel shutoff valve closed
Fix: Open valve, if so equipped.
The engine will not crank
Cause: System control fuse blown
Fix: Replace fuse.
The engine starts, but shuts down when the Start/Stop switch is released
Cause: Low engine oil level
Fix: Check oil and add oil, as needed.
The engine starts hard and runs rough
Cause: Plugged or damaged air filter
Fix: Check, clean, or replace, as needed.
Engine cranks but will not start — spark plug is wet
Cause: Overchoking
Engine cranks but will not start — spark plug is dry
Cause: Leaking carburetor mounting gaskets
The Start/Stop switch is set to Stop, but the engine continues to run
Cause: Defective Start/Stop switch
Fix: Replace switch.
There is no AC output from the generator
Cause: Main-line circuit breaker open
Fix: Reset line breaker to ON (or closed).
Engine starts hard or will not start
Cause: Physical damage to the AC generator; check the Rotor for contact with the Stator
Voltage & frequency are both high or low
Fix: Go to Test 2 (Check Engine Governor)
Problem continues after adjusting valves to specification
Cause: Valve clearance out of adjustment
Fix: Adjust valves to specification and retest; if problem continues, go to Test 38
No-load voltage and frequency are within the stated limits
Fix: Go to Test 13
Hard starting or failure to start
Cause: Flywheel key sheared or partially sheared, changing ignition timing
Fix: Remove and inspect flywheel key for damage
Governed speed is high or low, causing AC frequency and voltage to be correspondingly high or low
Cause: Governor out of adjustment
Fix: Loosen the GOVERNOR CLAMP BOLT; push Spring end of GOVERNOR LEVER clockwise to wide open throttle position of lever; hold the GOVERNOR LEVER at wide open throttle and, with a pair of pliers, rotate the GOVERNOR SHAFT fully clockwise (CW) using a minimum amount of force against the governor shaft; while holding the GOVERNOR SHAFT fully clockwise and the GOVERNOR LEVER at wide open throttle, tighten the GOVERNOR CLAMP BOLT to 70 inch-pounds (8 N-m); start engine, let it stabilize and warm up at no-load; turn the ADJUSTER NUT to obtain a frequency reading of 62 Hertz; if droop is excessive, move the GOVERNOR SPRING down one slot on LEVER; for greater stability, move the GOVERNOR SPRING up one slot on LEVER; after repositioning the SPRING on a LEVER slot, recheck frequency reading and, if necessary, readjust ADJUSTER NUT to obtain 62 Hertz at no-load; when frequency is correct at no-load, check the AC voltage reading and if voltage is incorrect, the voltage regulator may require adjustment
Generator produces zero voltage or residual voltage (5-12 VAC)
Fix: Go to Test 3 (Test Excitation Circuit Breaker)

Compiled from service & troubleshooting documentation across every generator set that uses the ISM Diesel 1.0L Diesel.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter	Disposable Filter		—	500 hr
Fuel filter	Full Flow Spin-On		069858	250 hr	Amazon eBay $40.00
Oil filter	Full Flow with Bypass Valve		126-70939	250 hr	Amazon eBay NAPA $9.09
Battery	12-volt DC, 70 Ah, 360 CCA minimum		—	250 hr
Belt	Alternator Drive / Cooling Fan Drive Belts		0C5298	750 hr	Amazon eBay $31.99
Coolant	50:50 mixture low silicate ethylene glycol and soft water	5.3 L	—	500 hr
Oil	API CC, SAE 15W-40	3.5 L	—	250 hr

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

Service intervals

Item	Action	Hours	Months	Notes
Engine oil level	Check	8 hr		Check at least every eight hours of operation or before use
Oil level	Check	8 hr		Every 8 h / daily
Foam Precleaner	Clean	25 hr	3 mo	Every three months or every 25 hours, whichever occurs first
Spark Arrestor	Clean	50 hr	12 mo	Inspect and clean every 50 hours or once each year, whichever comes first
Air Pre-filter	Clean	100 hr		From RV Generator Service Interval list
Air pre-filter (foam precleaner)	Clean	100 hr	3 mo	Every three months or every 100 hours, whichever occurs first
Engine Oil and Oil Filter	Change	100 hr		First service — Every 100 operating hours; more often under heavy load or high ambient temperature
Engine cooling system	Inspect	100 hr	1 mo	First service — After 25-H break-in; every 100 H/M
Engine oil	Change	100 hr		First service — Change after first 25 hours, then every 100 hours
Exhaust system	Inspect	100 hr	1 mo
Oil filter	Change	250 hr	6 mo	First service — Change after first 25 hours, then every 100 hours
Oil line leakage	Inspect	100 hr		To be completed by a Generac Authorized Service Dealer
Spark Plug	Clean	100 hr		Clean plug and reset gap every 100 hours
Spark Plugs	Inspect	100 hr		RV Generator Service Interval list
Clean out Muffler/Spark Arrestor	Clean	150 hr	12 mo	Every 150 H / Yearly
Battery charge and condition	Test	250 hr	6 mo	Weekly and every 250 H/6M
Charge and condition (battery)	Test	250 hr	6 mo	Weekly and every 250 H / 6 M
Enclosure louvers	Clean	250 hr	6 mo
Fuel Filter	Replace	400 hr	12 mo	To be completed by a Generac Authorized Service Dealer
Fuel lines and connections	Inspect	250 hr	6 mo	First service — After 25-H break-in; to be completed by a Generac Authorized Service Dealer
Oil	Change	250 hr	6 mo	First service — After 25-H break-in
Paper air filter element	Replace	250 hr
Air filter	Replace	500 hr
Coolant	Change	500 hr	12 mo	Every 500 H/Y
Muffler / spark arrestor	Clean	500 hr
Spark plugs	Replace	500 hr
Valve Lash	Adjust	500 hr		First service — 1st 50 hours, then every 500 hours
Compression	Test	750 hr		Authorized Service Dealer
Cylinder head	Adjust	750 hr		Retorque
Exhaust manifold	Adjust	750 hr		Retorque
Fan/alternator belts tension and condition	Inspect	750 hr		Replace as needed
Governor	Adjust	750 hr		Authorized Service Dealer
Injection system	Adjust	750 hr		Authorized Service Dealer
Injection system	Inspect	750 hr
Intake manifold	Adjust	750 hr		Retorque
Retorque Exhaust Manifold	Adjust	750 hr		Authorized Service Dealer
Retorque cylinder head	Adjust	750 hr		Authorized Service Dealer
Retorque intake manifold	Adjust	750 hr		Authorized Service Dealer
Safety devices	Test	750 hr		Authorized Service Dealer
Starter motor	Inspect	750 hr		Authorized Service Dealer

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
Clearance	Belt tensioning spring compression, side bolts	5/8	inch	between washer and bearing carrier
Clearance	Belt tensioning spring compression, stator stud nuts	1/2	inch	between washer and support slide
Clearance	Clearance between fuel line and exhaust system	2	inches
Clearance	Exhaust clearance to combustible material	3	inches
Clearance	Exhaust system to combustible material	3	inch
Gap	Ignition magneto (armature) to flywheel air gap	0.012" to 0.015"	inch
Gap	Spark plug gap	0.030	inch (0.8 mm)
Gap	Spark plug gap	0.040	inch
Gap	Spark plug gap	1.02	mm
Other	AC voltage regulation	115	volts	at 60 Hertz AC frequency
Other	Compression ratio	8.6 to 1
Other	Minimum cooling air inlet opening	150	square inches	unrestricted
Other	Nominal starter amp draw in generator	60	Amps
Other	Normal battery charge output	0.8 to 2	Amps	no load to full load
Other	Rated horsepower	13	hp	@ 1,950 rpm
Other	Rotor amp draw	0.85	A	±20% current draw
Other	Rotor amp draw	0.87-.79	A	±20% current draw
Other	Rotor amp draw	1.2	A	±20% current draw
Other	Starter motor maximum amps	50	Amps	bench test
Other	Voltage-to-frequency ratio	2-to-1		at 60 Hz, 120 volts
Pressure	Engine oil pressure	29-71	psi
Pressure	Engine oil pressure (low oil pressure switch test)	above 10	psi	engine running
Pressure	Fuel pump outlet pressure	2.0 to 3.5	psi
Pressure	LP fuel system leak test pressure	90	psi
Pressure	LP gas pressure at LPG shut off valve inlet	11-14	inches water column
Pressure	LP gas pressure at gaseous fuel solenoid valve and secondary regulator inlet	11	inches water column	optimum
Pressure	LP gas pressure at inlet to gaseous fuel solenoid and secondary regulator	11	inches water column
Pressure	LP gas pressure to solenoid valve	14	inches water column	do NOT exceed
Pressure	LP gas system leak test pressure	90	psi (620 kPa)	not less than, test with soap and water solution
Pressure	LP primary regulator maximum outlet pressure	14	inches water column	do not exceed
Pressure	Low oil pressure switch actuation	10	psi	approximately
Pressure	Low oil pressure switch setpoint	10	psi	approximate
Pressure	Low oil pressure switch trip point	below 10	psi	switch closes below this pressure
Resistance	AC power winding (11P-22P, 11S-22S, 33-44)	0.157 - 0.182	ohms	at 20°C (68°F), tolerance ±5%
Resistance	AC power winding (11P-22P, 11S-22S, 33-44)	0.209 - 0.242	ohms	at 20°C (68°F), tolerance ±5%
Resistance	AC power winding (11P-22P, 11S-22S, 33-44)	0.280 - 0.320	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Battery charge resistor (R1)	1	ohm, 25 watt
Resistance	Battery charge winding (Wires 55 & 66)	0.092 - 0.107	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Battery charge winding (Wires 55 & 66)	0.100 - 0.116	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Battery charge winding (Wires 55 & 66)	0.104 - 0.120	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Battery charge winding (Wires 55 & 77)	0.076 - 0.088	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Battery charge winding (Wires 55 & 77)	0.087 - 0.101	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Battery charge winding (Wires 55 & 77)	0.100 - 0.116	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Bi-metal heater assembly resistance	37	ohms	±20%
Resistance	Choke solenoid coil resistance	3.7	ohms
Resistance	Excitation 'DPE' winding (Wires 2 & 6)	1.12 - 1.30	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Excitation 'DPE' winding (Wires 2 & 6)	1.41 - 1.63	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Excitation 'DPE' winding (Wires 2 & 6)	1.59 - 1.84	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Fuel solenoid coil resistance (gasoline)	38.0	ohms
Resistance	LPG fuel solenoid coil resistance	30-32	ohms
Resistance	Rotor minimum insulation resistance	1.5	megohms
Resistance	Rotor winding (slip ring to slip ring)	10.81	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Rotor winding (slip ring to slip ring)	14.50 - 16.0	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Rotor winding (slip ring to slip ring)	14.88	ohms	at 20°C (68°F), tolerance ±5%
Resistance	Starter contactor relay coil resistance	155	ohms
Resistance	Stator minimum insulation resistance (120 VAC)	1.12	megohms	per formula (rated volts/1000)+1
Speed	2-pole rotor speed for 60 Hertz	3600	rpm
Speed	Engine cranking speed for spark test	350	rpm or more	cranking
Speed	Engine governor speed	2200	rpm
Speed	Engine governor speed	2571	rpm

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	Ambient	Capacity	Notes
Coolant	50-50 mixture of low silicate ethylene glycol base antifreeze and soft water			5.3 L	Use only soft water and low silicate antifreeze
Coolant	50:50 mixture of low silicate ethylene glycol base antifreeze and soft water			5.3 L	Use only soft water and low silicate antifreeze; do not use chromate base rust inhibitor or high-silicate additives
Engine oil	5W-30 or 5W-20				Data decal (SAE VISCOSITY) alternate viscosity
Engine oil	SAE 10W-30	API classification 'For Service SF'		1.8 liters	Crankcase capacity 1.8 liters or 1.9 quarts with oil filter change; do not pour in additives
Engine oil	SAE 30 or 10W-30				Data decal (SAE VISCOSITY); temperature 40°F and higher
Engine oil	SAE 30 or SAE 10W-30	API SF, SG, SH or SJ			During summer months (40 deg. F and higher). DO NOT USE SAE 10W-40. DO NOT use special additives.
Engine oil	SAE 5W-20 or SAE 5W-30	API 'For Service CC'	below 4°C		For below 40 F (4.4 C)
Engine oil	SAE 5W-30	API classification 'For Service SF'			Used to refill crankcase during out-of-service storage
Engine oil	SAE 5W-30 or SAE 5W-20	API SF, SG, SH or SJ			During winter months (40 deg. F to -20 deg. F)
Engine oil	SAE 10W-30 or SAE 30	API 'For Service CC'	4°C to 38°C		For 40 to 100 F (4.4 to 38 C)
Engine oil	SAE 15W-40 or SAE 40	API 'For Service CC'	above 38°C	3.5 L	For ambient above 100 F (38 C); do not use special additives
Fuel	Gasoline or LP (vapor withdrawal)				Shelf life on gasoline is 30 days; a fuel stabilizer must be used at all times. LP must be supplied at 11-14 inches water column.
Fuel	High quality UNLEADED gasoline				Leaded REGULAR grade acceptable substitute; alcohol content must not exceed 10 percent ethanol; do NOT use methanol
Fuel	LP gas (vapor withdrawal only)				Recommended minimum gas flow rate for air-cooled generators is 67 cubic feet per hour
Fuel	No. 1D or No. 2D diesel	ASTM; minimum Cetane number 40			Protect against gelling at low ambient temperatures
Fuel	No. 1D or No. 2D diesel fuel	ASTM; minimum Cetane number of 40			Use clean, fresh diesel fuel; never use dirty or contaminated fuel
Fuel	Unleaded gasoline (high quality); leaded REGULAR grade is an acceptable substitute	max 10 percent ethanol if alcohol present; DO NOT use methanol			Remove alcohol-containing fuel during storage
Other	LP (liquid propane) gas				Vapor withdrawal type systems only

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

Procedures

Adjust Choke Solenoid adjustment

Loosen screws retaining choke solenoid to its bracket.
Slide choke solenoid in slotted holes to adjust axial movement of solenoid plunger.
Adjust until, with choke plate closed, solenoid is bottomed in its coil.
Tighten the two screws; verify plunger and linkage move freely.

Adjust Engine Governor adjustment

Tools: pliers

Loosen the governor clamp bolt.
Hold governor lever at wide open throttle and rotate governor shaft fully clockwise.
While holding, tighten governor clamp bolt to 70 inch-pounds (8 N-m).
Start engine and let it stabilize.
Turn adjuster nut to obtain 62 Hertz.
Check AC voltage; adjust voltage regulator if needed.

Adjust Valve Clearance adjustment

Tools: 10mm allen wrench, feeler gauge, crow's foot

Loosen the rocker arm jam nut.
Use a 10mm allen wrench to turn the pivot ball stud while checking clearance with a feeler gauge.
When clearance is correct, hold the pivot ball stud and tighten the jam nut with a crow's foot.
Recheck valve clearance to be sure it did not change.

Adjust Voltage Regulator adjustment

Set frequency at 62.5 Hertz with no load on generator.
Slowly turn the voltage adjust pot until 124 VAC is measured.
If voltage is not adjustable, refer to troubleshooting.

Adjusting Valve Clearance adjustment

⚠ Hold the rocker arm jam nut in place as the pivot ball stud is turned.

⚠ Start all four screws before tightening.

Tools: Feeler gauge, 10mm allen wrench, #2 or #3 Phillips screwdriver, Large socket and socket wrench

Make sure the engine is cool and at 60 deg to 80 deg F.
Remove spark plug wires and position them away from plugs.
Remove spark plugs.
Rotate the engine clockwise with a socket on the flywheel nut to bring the piston to Top Dead Center of its compression stroke.
Remove the four screws attaching the valve cover.
Loosen the rocker jam nut and use a 10 mm allen wrench to turn the pivot ball stud while checking clearance with a feeler gauge.
When clearance is correct, hold the pivot ball stud and tighten the rocker arm jam nut to 174 in/lbs.
Recheck valve clearance after tightening.
Install a new valve cover gasket and re-attach the valve cover.
Install spark plugs and re-attach the spark plug wires.

Check and Adjust Valve Clearance adjustment

Tools: 10mm allen wrench, feeler gauge, crow's foot torque wrench

Adjust valve clearance with engine at room temperature, piston at TDC of compression stroke.
Loosen rocker arm jam nut, use 10mm allen wrench to turn pivot ball stud while checking clearance with feeler gauge.
Set intake valve clearance 0.002-0.004 in and exhaust valve clearance 0.002-0.004 in.
Hold pivot ball stud with allen wrench and tighten rocker arm jam nut to 174 inch-pounds with a crow's foot.
Recheck valve clearance after tightening jam nut.
Install rocker arm cover with new gasket and retain with four screws.

Governor Adjustment adjustment

Tools: Pliers

Loosen governor clamp bolt.
Push spring end of governor lever clockwise to wide open throttle position.
Hold governor lever at wide open throttle and rotate governor shaft fully clockwise with pliers.
Tighten governor clamp bolt to 70 inch-pounds (8 N-m) while holding shaft and lever.
Start engine, let stabilize and warm up at no-load.
Turn adjuster nut to obtain 62 Hertz frequency reading.
Reposition governor spring in lever slot if droop is excessive or for greater stability.
Recheck frequency and readjust adjuster nut to obtain 62 Hertz at no-load.
Check AC voltage reading; adjust voltage regulator if incorrect.

Set Ignition Magneto Air Gap adjustment

Tools: thickness gauge

Rotate flywheel until magnet is under the module armature laminations.
Place a 0.012-0.015 inch thickness gauge between flywheel magnet and module laminations.
Loosen mounting screws and let magnet pull magneto down against gauge.
Tighten both mounting screws.
Remove thickness gauge by rotating flywheel.
Repeat for second magneto.

Voltage Regulator Adjustment adjustment

⚠ Adjustment must be done only when unit is running at correct governed no-load speed

Run unit at no-load with frequency set to 62.5 Hz.
Slowly turn voltage adjust pot on voltage regulator until 124 VAC is measured.
If voltage is not adjustable, proceed to troubleshooting Problem 2.

Compression Test diagnostic

Tools: compression gauge

Remove both spark plugs.
Insert a compression gauge into either cylinder.
Crank engine until there is no further increase in pressure.
Record the highest reading.
Repeat for the remaining cylinder and record.

Cylinder Leak Down Test diagnostic

Tools: cylinder leak down tester, air source

Remove a spark plug and remove the valve cover.
Rotate crankshaft until piston reaches top dead center; both valves closed.
Lock flywheel at top dead center.
Attach leak down tester adapter to spark plug hole.
Connect air source of at least 90 psi and adjust regulated pressure to 80 psi.
Read cylinder pressure; 20 percent leakage is normally acceptable.
Listen for air escaping at carburetor, exhaust and crankcase breather.
Repeat on the remaining cylinder.

Starter Motor Performance Test diagnostic

Tools: clamp-on ammeter, tachometer (P/N 042223), fully charged 12-volt battery, test bracket

A fully charged 12 volt battery is required.
Connect jumper cables and clamp-on ammeter as shown.
Activate the starter motor and note ammeter and tachometer readings after 2-4 seconds stabilization.
Good starter will be within minimum rpm and maximum amps specification.

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
120	1	120 VAC loads only - line to neutral	T1 (Red) and T3 (Black) hot; T2 (White) grounded neutral; green ground wire	One load with a maximum total wattage requirement equal to the generator's rated power output, with 120V across the generator output terminals
120	1	120VAC only (single load)	Stator power leads 11P and 33; customer connections T1 (Red), T2 (White), T3 (Black)	Figure 1-8, page 7. Total load may not exceed the generator rated power output.
120	1	Line T1 (Red) to T2 (White) via circuit breaker CB1	T1 (Red), T2 (White)	120V single-phase 60 Hz loads
120	1	Line T3 (Black) to T2 (White) via circuit breaker CB2	T3 (Black), T2 (White)	120V single-phase 60 Hz loads; total unit load must not exceed maximum generator rating
120	Single	120 volts only - dual circuits	Re-route stator lead 44 to ground stud previously occupied by 33; re-route lead 33 to line side of CB1; renumber ground wire 33 as 44; renumber 44A as 33A	Requires 12 AWG jumper between CB1 and CB1A; remove tie bar between breaker handles
120	Single	120 volts only - dual circuits (conversion)	Stator lead 33 rerouted to line side of CB1A; stator lead 44 moved to ground stud; wire #44 renumbered #11; ground wire 33 renumbered 44; wire 44A renumbered 33A	Two stator windings, each protected by line breakers CB1 and CB1A (trip rating 35 amps); neutral (T2 white) is grounded
120	single phase	120 VAC loads only - one load with maximum total wattage equal to the generator's rated power output; 120V across the generator output terminals	T1 (red), T2 (white), T3 (black), green ground; grounded neutral	Figure 1.1/5.1 - Connection for 120 Volts Only
120 VAC only	1-Phase	Single load, 120V across output terminals	11P/22P, 33/44	Max wattage equal to rated output
120/240	1	120/240 VAC loads - dual voltage output	T1 (Red), T2 (White), T3 (Black) plus green ground wire	One 240V load at rated output, OR two separate 120V loads each at half rated output. Loads across T1-T2 and T3-T2 must not exceed ratings. Unit is reconnectable to 120 and/or 240 volts; not RVIA/ANSI listed when reconnected for dual voltage.
120/240	1	Dual voltage output	Stator output leads 11P and 44 form the two hot leads (T1-Red and T3-Black); junction of leads 22P and 33 forms the Neutral line (T2-White), neutral remains grounded	Figure 1-9. If reconnected for dual voltage the unit is no longer RVIA listed. Units with two 30A or two 35A breakers may reuse existing breakers; units with a 30A and a 20A breaker may use two 25A main breakers with a connecting piece between handles.
120/240	Single	Dual voltage - stator power windings connected in series (factory shipped)	Lead 11/11A to T1 (Red); lead 44/44A to T3 (Black); leads 22 and 33 grounded to T2 NEUTRAL (White); green ground lead	Tie bar connects the two switch handles on line breaker CB1
120/240	Single	Series (dual voltage), factory default	11/11A to T1 (red); 44/44A to T3 (black); 22 and 33 grounded to T2 neutral (white)	Four-position terminal block; tie bar connects CB1 and CB1A handles; CB1 and CB1A trip rating 35 A
120/240	single phase	120/240 VAC loads - one load with maximum total wattage equal to rated output at 240V; or two separate loads each up to half rated output at 120V	T1 (red), T3 (black) are 'hot'; T2 (white) is the grounded neutral; green lead connects to ground	Figure 1.2/5.3 - Connection for 120/240 Volts; units not listed per RVIA/ANSI when reconnected for dual voltage output
120/240 VAC	1-Phase	Dual voltage output, two hot leads T1(11P/44 red) T3(33 black), neutral T2 (22P/33 white)	11P, 22P, 33, 44	No longer RVIA listed if reconnected for dual voltage

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

Common questions

What is the oil capacity of the ISM Diesel 1.0L Diesel?

The ISM Diesel 1.0L Diesel engine has an oil capacity of 3.5 liters.

What is the displacement of the ISM Diesel 1.0L Diesel?

The ISM Diesel 1.0L Diesel has a displacement of 0.954 liters with 3 cylinders.

Which generators use the ISM Diesel 1.0L Diesel engine?

The ISM Diesel 1.0L Diesel powers 1 generator set(s), including Generac QUIETPACT 75.

How often should you change the oil in the ISM Diesel 1.0L Diesel?

The ISM Diesel 1.0L Diesel oil change interval is every 250 hours.

What is a common problem with the ISM Diesel 1.0L Diesel engine?

A commonly reported issue on generators using the ISM Diesel 1.0L Diesel is: The engine cranks but will not start. Cause: Vehicle fuel shutoff valve closed. Fix: Open valve, if so equipped..