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Home›Generac›Generac QT025

Generac QT025 Generator Set

The Generac QT025 is a 25 kW (31 kVA) NG/LPV standby generator set powered by a Generac 1.6L engine. It is available at 120/240 V and 120/208 V, Single/Three-phase and 60 Hz. It holds about 3.79 L (1.0 gal) of oil and 11.36 L (3.0 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses group-26 battery rated 525 CCA at 12 V. The set weighs about 1163 kg (2564 lb) and produces 58 dBA at 7 m.

25 kW
Standby
1.6 L
Displacement
3.785 L
Oil capacity
2
Document types

How to read your Generac serial & model number →

Specifications

FuelNG/LPV
Frequency60.0 Hz
Standby power25 kW
Standby kVA31
EmissionsEPA
ControllerH-100, Nexus, R-100 Digital, R100
Oil capacity3.785 L
Alternator390mm
Voltage options120/240 V, 120/208 V
PhaseSingle/Three
Battery group26
Battery cranking525 CCA
Battery voltage12V V
Coolant capacity11.355 L
Max ambient50 °C
Dry weight1163 kg
Sound level72.0 dBA @ 7 m

Engine

Generac 1.6L
Oil capacity3.785 L
Coolant capacity7.57 L
Displacement1.6 L
AspirationNaturally Aspirated
Rated speed3600 rpm

Maintenance & consumables

for the Generac 1.6L
ItemSpecCapacityPart #Interval
Air filter059402500 hr Amazon eBay $23.38 PartsGeek
Fuel filterinspect and test fuel system—50 hr find
Oil filter0G02070100100 hr Amazon eBay $24.99 PartsGeek
Belt0G0823 Amazon eBay PartsGeek
CoolantLOW SILICATE, ETHYLENE GLYCOL BASE8.5 LITERS—
Coolant filtercheck starter, check engine DC alternator— find
Oil15W-40—500 hr

Common questions

What is the power rating of the Generac QT025?

The Generac QT025 is rated 25 kW standby (31.0 kVA).

What engine does the Generac QT025 use?

The Generac QT025 is powered by the Generac 1.6L engine.

What fuel does the Generac QT025 use?

The Generac QT025 runs on NG/LPV.

What is the oil capacity of the Generac QT025?

The Generac 1.6L engine in the Generac QT025 has an oil capacity of 3.785 liters.

What alternator does the Generac QT025 use?

The Generac QT025 uses a 390mm alternator.

Parts

250
Part #DescriptionQtySystem
006199-0PMM Starter KitStarter Amazon eBay PartsGeek
029032HOSE 9/32 ID (47” LG)1Hose PartsGeek
035472CLAMP HOSE #6 .43-.781Hose PartsGeek
035685CLAMP HOSE #28 1.32-2.252Hose PartsGeek
040105HOSE COOL 2IN ID 20R4 (3FT)1Hose PartsGeek
044149GASKET EXHAUST RING1Gasket PartsGeek
047290HOSE 3/8 ID SINGLE BRAID (18” LG)1Hose PartsGeek
048031CCLAMP HOSE BAND 1/42Hose PartsGeek
048031JCLAMP HOSE BAND .634Hose PartsGeek
048031LCLAMP HOSE BAND 1.0"4Hose PartsGeek
048031PCLAMP HOSE BAND .88"1Hose PartsGeek
057753BHOSE 1.5 ID X 2 LG 20R4 (35KW)1Hose PartsGeek
057822CLAMP HOSE #8 .53-1.002Hose PartsGeek
057823CLAMP HOSE #10 .56-1.064Hose PartsGeek
058208BATTERY 12V GRP 26Battery Amazon eBay $50.00 PartsGeek
059057HOSE 3/4 ID SAE-30R2 (7.62”LG”)1Hose PartsGeek
059194HOSE 5/8 ID LPG & NG (12” LG)1Hose PartsGeek
059401CARBURETOR GASKET1Gasket PartsGeek
059402FILTER ELEMENT1Air filter Amazon eBay $23.38 PartsGeek
066760STRIP SEALANT 1/8 X 1 (44.52”LG)1Seal PartsGeek
069860BHOSE OIL DRAIN ASSY 16"1Hose PartsGeek
069860CHOSE OIL DRAIN ASSY 21"1Hose PartsGeek
069860EHOSE DRAIN ASSY 28"1Hose PartsGeek
071296AHOSE 2"ID X 3.0"LG2Hose PartsGeek
075885THERMOSTAT 195 DEG1Thermostat PartsGeek
077483BATTERY 12VDC 75-AH 26 (SOLD AS AN OPTION)REFBattery Amazon eBay $44.99 PartsGeek
084750PLUG SPARK4Spark plug Amazon eBay $14.99 PartsGeek
099502CLAMP HOSE #24 B1.06-2.006Hose PartsGeek
0A45310244FILTER OIL1Oil filter Amazon eBay $24.99 PartsGeek
0A45310257GASKET INLET MANIFOLD1Gasket PartsGeek
0A45310258GASKET-EXHAUST MANIFOLD1Gasket PartsGeek
0A5110PIPE WATER-INLET1Hose PartsGeek
0A5259AHOSE 2"ID X 3.0"LG2Hose PartsGeek
0A5547COVER AIR CLEANER1Air filter PartsGeek
0A6258HOSE - UPPER RADIATR1Hose PartsGeek
0A6284HOSE - LOWER RADIATR1Hose PartsGeek
0A6751SW-TMP 245DEG 3/8NPT1Sensor PartsGeek
0A8584OIL FILTER1Sensor PartsGeek FridayParts $31.60
0C5133O-RING 29.82 X 2.621Seal PartsGeek
0C7649CLAMP HOSE .38-.873Hose PartsGeek
0C8127ELEMENT, AIR CLEANER1Air filter Amazon eBay $28.00 PartsGeek
0D2244MMAGNETIC PICKUP2Sensor PartsGeek FridayParts $18.08
0D3488SBELT SERPENTINE 37.0" (1800 RPM)1Belt Amazon eBay PartsGeek
0E0502TEMPERATURE SENDER, DELPHI1Sensor PartsGeek
0E0668O-RING 2-028 1.38 X 1.50 X .061Seal PartsGeek
0E0991SEAL SHAFT COVER1Seal PartsGeek
0E1104GASKET AIR CLEANER ADAPTER1Gasket PartsGeek
0E2507PROBE COOLANT LEVEL 3/8NPTF1Sensor PartsGeek
0E3256V-BELT A58 (60IN O.C.) DDC S601Belt Amazon eBay PartsGeek
0E5968GASKET EXTRUDED TRIM (328” LG)1Gasket PartsGeek
0E6586GASKET, BOSCH 32 & 402Gasket PartsGeek
0E7121O-RING 47.625 ID X 2.38 WIDTH2Seal PartsGeek
0E9747STARTER, 12 VOLT1Starter PartsGeek
0E9868AALTERNATOR DC W/OUT PULLEY1Alternator PartsGeek
0F2119O-RING 45.63 ID X 2.62 WIDTH1Seal PartsGeek
0F2560PULLEY V-BELT 4" FLANGED1Belt PartsGeek
0F4269GASKET MIXER BODY2Gasket PartsGeek
0F4270HOLD DOWN AIR CLEANER PLATED1Air filter PartsGeek
0F4271BASE PLATE, AIR CLEANER1Air filter PartsGeek
0F4612SENDER OIL PRESSURE 1/8" NPT (H-PANEL)1Sensor PartsGeek
0F5263V-BELT 31/64" X 57-3/8"1Belt Amazon eBay PartsGeek
0F5418ELEMENT AIR FILTER1Air filter Amazon eBay $18.99 PartsGeek
0F6145SEAL WEATHER .45"DIAA/RSeal PartsGeek
0F6305SEAL COVER 3.18X12.7X3822Seal PartsGeek
0F6305ASEAL COVER 3.18X12.7X2831Seal PartsGeek
0F6323PLATE, AIR CLEANER TOP1Air filter PartsGeek
0G0153BARBED EL 90 1/2NPT X 3/4 HOSE1Hose PartsGeek
0G02070100OIL FILTER 1.6L1Oil filter Amazon eBay $24.99 PartsGeek
0G0464GASKET INTAKE MANIFOLD 1.6L1Gasket PartsGeek
0G0465GASKET EXHAUST MANIFOLD 1.6L1Gasket PartsGeek
0G0664OIL FILTER G2 ENGINE1Oil filter Amazon eBay $35.00 PartsGeek
0G0707MANIFOLD INTAKE (USE HOSE 0G0816)1Hose PartsGeek
0G0788PULLEY DC ALTERNATOR (3600 RPM)1Alternator Amazon eBay PartsGeek
0G0795HOSE LOWER RADIATOR G21Hose PartsGeek
0G0816HOSE UPPER RADIATOR G2 (USED WITH MANFLD P/N 0G0707)1Hose PartsGeek
0G0823V-BELT 3/8 X 30.6 (3600RPM)1Belt Amazon eBay PartsGeek
0G0950GASKET INTAKE MANIFOLD G21Gasket PartsGeek
0G0951GASKET EXHAUST MANIFOLD1Gasket PartsGeek
0G0952POLY V-BELT G2 (3600 RPM)1Belt Amazon eBay $40.00 PartsGeek
0G10080103GASKET, PCV VALVE1Gasket PartsGeek
0G10080288CABLE, SPARK PLUG, NO.11Spark plug Amazon eBay $25.00 PartsGeek
0G10080289CABLE, SPARK PLUG, NO.21Spark plug Amazon eBay PartsGeek
0G10080290CABLE, SPARK PLUG, NO.31Spark plug Amazon eBay PartsGeek
0G10080291CABLE, SPARK PLUG, NO.41Spark plug Amazon eBay PartsGeek
0G1472ACAM SENSOR PIN ASSY1Sensor PartsGeek
0G1985HOSE BARB REDUCR TEE 3/4"-3/8"1Hose PartsGeek
0G2750PULLEY 69 OD DC ALTERNATOR (1800 RPM)1Alternator PartsGeek
0G3167O-RING 2-3/4 X 3/32 X 2-15/162Seal PartsGeek
0G3178HOSE BREATHER 1.6L1Hose PartsGeek
0G3461ALTERNATOR SUPPORT BLOCK OFF2Alternator PartsGeek
0G3823O-RING SIZE 9.0MM X 2.0MM NITR2Seal PartsGeek
0G3921AVR SENSOR ASSY 3/8-24 LOW SENS1Sensor PartsGeek
0G3985TUBE CAC IN G2 TURBO1Turbocharger PartsGeek
0G3989TUBE CAC OUT G2 TURBO1Turbocharger PartsGeek
0G3990COOLER OIL 2.4L G2 TURBO1Turbocharger PartsGeek
0G4070HOSE REAR COOLANT 1.6L1Hose PartsGeek
0G4071HOSE UPPER RADIATOR 1.6L1Hose PartsGeek
0G4080HOSE LOWER RADIATOR 1.6L1Hose PartsGeek
0G4604DC ALTERNATOR ADAPTER MACHINED1Alternator PartsGeek
0G4949V-BELT 3/8 X 31.6 (1800RPM)1Belt Amazon eBay PartsGeek
0G7461STARTER MOTOR 12V1Starter PartsGeek
0G7902TUBE TURBO OIL RETURN G2 2.4L1Turbocharger PartsGeek
0G8690GASKET 2.4L G21Gasket PartsGeek
0G8692GASKET 2.4L G21Gasket PartsGeek
0G8830HOSE UPPER RADIATOR 2.4L1Hose PartsGeek
0G8831HOSE LOWER RADIATOR 2.4L1Hose PartsGeek
0G8854SPARK PLUG WIRE SET 2.4L G2 IG1Spark plug PartsGeek
0G9329ADAPTOR OIL FILTER 2.4L G21Oil filter PartsGeek
0G9330NUT OIL FILTER ADAPTOR 2.4L G21Oil filter PartsGeek
0G9331MOUNT REMOTE OIL FILTER 2.4 G21Oil filter PartsGeek
0G9332AOIL LINE REMOTE ENG/COOLER1Hose PartsGeek
0G9332BOIL LINE REMOTE COOLER/FILTER1Hose PartsGeek
0G9332COIL LINE REMOTE FILTER/ENGINE1Hose PartsGeek
0G9333NIPPLE-OIL FILTER1Oil filter PartsGeek
0G9349O-RING 1" X 1.25" X 1/8" VITON1Gasket PartsGeek
0G9350O-RING 2.5"X 2.75"X 1/8" VITON1Gasket PartsGeek
0G9473DEFLECTOR INTAKE 2.4L G2 TURBO1Turbocharger PartsGeek
0G9936TURBOCHARGER 2.4L 36KW 1800RPM1Turbocharger PartsGeek
0H0028ADAPTOR-AIR CLEANER1Air filter PartsGeek
0H0035HOSE AIR INTAKE1Hose PartsGeek
0H0788GASKET EXH MAN/TURBO1Gasket PartsGeek
0H0789GASKET TURBO/EXHAUST 2.4L 36KW1Gasket PartsGeek
0H0935TUBE TURBO OIL RETURN G2 36KW1Turbocharger PartsGeek
0H1432BMANIFOLD EXH 60K G2 TURBO (MA)1Turbocharger PartsGeek
0H1546HOSE UPPER RADIATOR G2 (USED WITH MANFLD P/N 0G8488)1Hose PartsGeek
0H1827PROBE COOLANT LEVEL 3/8-18NPTF (USE WITH I/N 40, P/N 0H1851)1Sensor PartsGeek
0H1851ASSY PCB LCL SENSOR (USE WITH I/N 33, P/N 0H1827 ONLY)1Sensor PartsGeek
0H20620ST03ARM BELT TENSIONER1Belt PartsGeek
0H2250HOSE COOLANT 3/8 ID 20R3 (11” LG)1Hose PartsGeek
0H2811TURBOCHARGER G2 2.4L1Turbocharger PartsGeek
100-A4531Gasket kit, Engine Overhaul1Gasket PartsGeek
101-A4531Gasket kit, Engine Overhaul, Upper1Gasket PartsGeek
103-A4531Gasket, Rocker Cover1Gasket PartsGeek
104-A4531Gasket, PCV Valve1Gasket PartsGeek
110-A4531Gasket, Engine Oil Filler Cap1Gasket PartsGeek
113-A4531Gasket, Cylinder Head1Gasket PartsGeek
118-97390VALVE COVER GASKET1Gasket PartsGeek
122-A4531Oil Seal, Camshaft1Seal PartsGeek
126-97390CAMSHAFT HOUSING GASKET1Gasket PartsGeek
135-97390FRONT WATER JACKET COVER GASKET1Gasket PartsGeek
135-A4531Gasket, Fuel Pump Hole Cover1Gasket PartsGeek
139-97390FRONT MAIN OIL SEAL RETAINER GASKET1Gasket PartsGeek
143-97390FRONT MAIN OIL SEAL1Seal PartsGeek
145-97390OIL PUMP DRIVE SHAFT SEAL1Seal PartsGeek
146-A4531Gasket, Rear Oil Seal Case1Gasket PartsGeek
148-97390OIL PUMP DRIVE SHAFT SEAL RETAINER GASKET1Gasket PartsGeek
150-97390REAR MAIN OIL SEAL RETAINER GASKET1Gasket PartsGeek
153-97390REAR MAIN OIL SEAL1Seal PartsGeek
154-97390REAR WATER JACKET COVER GASKET1Gasket PartsGeek
158-A4531Oil Seal, Crankshaft, Rear1Seal PartsGeek
160-97390OIL PAN GASKET1Gasket PartsGeek
161-A4531O-ring, Engine Oil Filler1Seal PartsGeek
164-A4531Gasket, Engine Oil Pan Drain Plug1Gasket PartsGeek
172-A4531Gasket, Timing Belt Cover1Gasket PartsGeek
173-A4531Gasket, Timing Belt Cover1Gasket PartsGeek
174-A4531Gasket, Timing Belt Cover1Gasket PartsGeek
175-A4531Gasket, Timing Belt Cover1Gasket PartsGeek
176-A4531Gasket, Timing Belt Cover1Gasket PartsGeek
177-A4531Gasket, Timing Belt Cover1Gasket PartsGeek
178-A4531Gasket, Timing Belt Cover1Gasket PartsGeek
179-A4531Strainer, Engine Oil Pan1Oil filter PartsGeek
180-A4531Gasket, Oil Strainer1Gasket PartsGeek
182-97390TIMING BELT1Belt PartsGeek
199-A4531Belt, Valve Timing1Belt PartsGeek
20439BELT, FAN (3600 RPM)1Belt PartsGeek
20621BELT, FAN (1800 RPM)1Belt PartsGeek
211-97390VALVE SEAL8Seal PartsGeek
222-97390OIL PUMP1Pump PartsGeek
230-A4531Seal, Intake Valve Stem (Rubber)8Seal PartsGeek
231-A4531Seal, Exhaust Valve Stem (Rubber)4Seal PartsGeek
237-A4531O-ring, Engine Front Case (16.8)1Seal PartsGeek
238-A4531Oil Seal, Crankshaft, Front1Seal PartsGeek
244-A4531Oil Filter1Oil filter Amazon eBay PartsGeek
247-97390THERMOSTAT1Thermostat PartsGeek
247-A4531Water Pump Assembly1Pump PartsGeek
257-A4531Gasket, Intake Manifold1Gasket PartsGeek
258-A4531Gasket, Exhaust Manifold1Gasket PartsGeek
261-97390WATER PUMP GASKET1Gasket PartsGeek
265-97390WATER PUMP1Pump PartsGeek
266-A4531O-ring, Distributor1Seal PartsGeek
267-A4531Pick-up Kit, Distributor1Sensor PartsGeek
275-A4531Spark Plug4Spark plug Amazon eBay $22.57 PartsGeek
29032HOSE 5/16" I.D.6-1/2"Hose PartsGeek
39379BELT, FAN1Belt PartsGeek
4101-97390HEAD GASKET1Gasket PartsGeek
4148-97390OIL PUMP DRIVE SHAFT COVER GASKET1Gasket PartsGeek
48665GASKET, WATER OUTLET1Gasket PartsGeek
50108Spring1Sensor PartsGeek atldiesel $497.47
50967HOSE- 5/8" I.D.3FT.Hose PartsGeek
50968HOSE26"Hose PartsGeek
53667TEMPERATURE SENSOR1Sensor PartsGeek
57522WATER LEVEL SENSOR1Sensor PartsGeek
59194HOSE, 5/8" I.D. X 36" LONG36"Hose PartsGeek
59401GASKET-CARBURETOR1Gasket Amazon eBay $24.99 PartsGeek
59402FILTER ELEMENT1Air filter Amazon eBay $5.60 PartsGeek
60108GASKET, OIL FILTER SUPPORT1Sensor PartsGeek
61903FFUEL LINE, LPG - 35" LONG35"Hose PartsGeek
69811CAP-OIL DRAIN HOSE1Hose Amazon eBay $15.65 PartsGeek
69860COIL DRAIN HOSE ASS'Y1Hose PartsGeek
73912AIR FILTER ELEMENT1Air filter PartsGeek
75130BELT, WATER PUMP1Belt PartsGeek
75885THERMOSTAT1Thermostat PartsGeek
79199BELT, WATER PUMP1Belt PartsGeek
82130BMPU, SPEED SENSOR, RPM1Sensor PartsGeek
97402INTAKE / EXHAUST GASKET2Gasket PartsGeek
98690EXHAUST ADAPTER GASKET1Gasket PartsGeek
98907THERMOSTAT GASKET1Gasket PartsGeek
99021OIL FILTER1Oil filter PartsGeek
99236SWITCH-OIL PRESSURE1Sensor eBay $9.99 PartsGeek
99478WATER TUBE GASKET1Gasket PartsGeek
99512COIL COVER GASKET1Gasket PartsGeek
A5275V-BELT (1800 RPM)1Belt PartsGeek
A5554SEAL-QUAD RING, THERMOSTAT1Seal PartsGeek
A5586V-BELT (3600 RPM)1Belt PartsGeek
A6258HOSE, UPPER1Hose PartsGeek
A6284HOSE, LOWER1Hose PartsGeek
A6751SWITCH-WATER TEMPERATURE1Sensor PartsGeek
A7006SEAL- O-RING1Seal PartsGeek
A8584SWITCH-OIL PRESSURE1Sensor PartsGeek
C3714HOSE ASSEMBLY NG/ LPG (1.5L)1Hose PartsGeek
005616-0Extreme Cold Weather KitService part / kit Amazon eBay $219.99 PartsGeek
005621-0Auxiliary Transfer Switch Contact KitService part / kit Amazon eBay PartsGeek
005630-0Cold Weather KitService part / kit Amazon eBay PartsGeek
005632-0Cold Weather KitService part / kit PartsGeek
005651-0Base Plug KitService part / kit Amazon eBay PartsGeek
005656-0Scheduled Maintenance KitService part / kit Amazon eBay PartsGeek
005703-0Paint KitService part / kit Amazon eBay PartsGeek
005704-0Paint KitService part / kit Amazon eBay PartsGeek
005928-0Wireless RemoteService part / kit PartsGeek
005951-0Advanced Wireless RemoteService part / kit PartsGeek
005984-0Scheduled Maintenance KitService part / kit PartsGeek
006186-0Power Management Module (50 Amps)Service part / kit Amazon eBay $66.89 PartsGeek
006204-0Extreme Cold Weather KitService part / kit PartsGeek
006205-0Scheduled Maintenance KitService part / kit PartsGeek
006463-1Mobile Link™Service part / kit PartsGeek
006478-0Harness Adapter KitService part / kit PartsGeek
006502-0Generac generator componentService part / kit PartsGeek
006504-0Generac generator componentService part / kit PartsGeek
006505-0Generac generator componentService part / kit PartsGeek
006506-0Generac generator componentService part / kit PartsGeek
006507-0Generac generator componentService part / kit PartsGeek
006510-0Generac generator componentService part / kit PartsGeek
006511-0Generac generator componentService part / kit PartsGeek
006512-0Generac generator componentService part / kit PartsGeek
006513-0Generac generator componentService part / kit PartsGeek
006516-0Generac generator componentService part / kit PartsGeek
006517-0Generac generator componentService part / kit PartsGeek
006558-0Maintenance KitService part / kit PartsGeek
006559-0Maintenance KitService part / kit PartsGeek
006560-0Maintenance KitService part / kit PartsGeek

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
1.6990.65
25%6.0941.53
50%9.0852.4
75%12.3793.27
100%15.7094.15
Prime0.65
Prime25%1.76
Prime50%2.77
Prime75%3.79
Prime100%4.81
Standby2.50.7
Standby25%11.04
Standby50%17.56
Standby75%24.07
Standby100%

Available documents

Brochure — 0170030SBY (Generac)Brochure — 0172950SBY (Generac)Spec sheet — 0171410SBY (Generac)Spec sheet — 0172980SBY (Generac)Spec sheet — 0172990SBY (Generac)Spec sheet — 0173110SBY (Generac)Spec sheet — 0173110sby-qt025a-spec (Generac)Spec sheet — 0187670SBY (Generac)Spec sheet — 0187670SBY Guardian 25kW (Generac)Spec sheet — 0194240SBY (Generac)Spec sheet — 0199380sby-c-qt025-30-45-60 (Generac)

Other sets with this engine

Generac QT020Generac QT030