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Generac QT020 Generator Set

The Generac QT020 is a 20 kW NG/LPV standby generator set powered by a Generac 1.5L engine. It is available at 120/240 V and 120/208 V, 1-phase and 60 Hz. It holds about 3.79 L (1.0 gal) of oil and 7.57 L (2.0 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses group-26 battery rated 525 CCA at 12 V. The set produces 63 dBA at 7 m.

20 kW
Standby
1.5 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 power20 kW
ControllerR-100 Digital, R100
Oil capacity3.785 L
Voltage options120/240 V, 120/208 V
Phase1-phase/3-phase
Power factor1
Battery group26F
Battery cranking525CCA CCA
Battery voltage12 Volts V
Coolant capacity7.57 L
Max ambient50 °C
Sound level63.0 dBA @ 7 m

Engine

Generac 1.5L
Oil capacity3.785 L
Coolant capacity7.57 L
Displacement1.5 L
AspirationNaturally Aspirated
Rated speed3600 rpm

Maintenance & consumables

for the Generac 1.5L
ItemSpecCapacityPart #Interval
Air filter59402500 hr Amazon eBay $5.60 PartsGeek
Oil filter0A45310244 Amazon eBay $24.99 PartsGeek
BeltValve Timing199-A4531 PartsGeek
CoolantLOW SILICATE, ETHYLENE GLYCOL BASE8.5 LITERS—
Oil15W-40—150 hr

Common questions

What is the power rating of the Generac QT020?

The Generac QT020 is rated 20 kW standby.

What engine does the Generac QT020 use?

The Generac QT020 is powered by the Generac 1.5L engine.

What fuel does the Generac QT020 use?

The Generac QT020 runs on NG/LPV.

What is the oil capacity of the Generac QT020?

The Generac 1.5L engine in the Generac QT020 has an oil capacity of 3.785 liters.

Parts

116
Part #DescriptionQtySystem
075885THERMOSTAT 195 DEG1Thermostat PartsGeek
0A45310244FILTER OIL1Oil filter Amazon eBay $24.99 PartsGeek
0A45310257GASKET INLET MANIFOLD1Gasket PartsGeek
0A45310258GASKET-EXHAUST MANIFOLD1Gasket PartsGeek
0A5110PIPE WATER-INLET1Hose PartsGeek
0A6258HOSE - UPPER RADIATR1Hose PartsGeek
0A6284HOSE - LOWER RADIATR1Hose PartsGeek
0A6751SW-TMP 245DEG 3/8NPT1Sensor PartsGeek
0A8584OIL FILTER1Sensor PartsGeek FridayParts $31.60
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
0A4355MANIFOLD-EXHAUST1Service part / kit PartsGeek
105-A4531Valve, PCV1Service part / kit PartsGeek
109-A4531Cap Assembly, Engine Oil Filler1Service part / kit PartsGeek
239-97390BREATHER1Service part / kit PartsGeek
245-97390FLAME TRAP1Service part / kit PartsGeek
261-A4531Cap Assembly, Distributor1Service part / kit PartsGeek
264-A4531Rotor, Distributor1Service part / kit PartsGeek
268-97390DISTRIBUTOR CAP1Service part / kit PartsGeek
268-A4531Ignitor Kit, Distributor1Service part / kit PartsGeek
269-97390ROTOR1Service part / kit PartsGeek
270-97390PULSE COIL1Service part / kit PartsGeek
271-97390VACUUM UNIT1Service part / kit PartsGeek
272-97390ELECTRONIC MODULE1Service part / kit PartsGeek
72557IGNITION COIL1Service part / kit PartsGeek
72587COIL, IGNITION1Service part / kit PartsGeek
A2666SOLENOID, VALVE2Service part / kit PartsGeek
A7097FUEL SOLENOID LP LIQUID1Service 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
Standby0.57
Standby0.65
Standby25%2.16
Standby50%3.0
Standby75%3.68
Standby100%

Available documents

Brochure — 0170030SBY (Generac)Brochure — 0172950SBY (Generac)Spec sheet — 0171400SBY (Generac)Spec sheet — 0173000SBY (Generac)

Other sets with this engine

Generac Guardian Liquid-cooledGenerac QT025Generac QT030