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8 Automatic Standby Generator Owner’s Manual
2.4 — Specifications
2.4.1 — Generator
2.4.2 — Engine
The specification sheet for your generator was included in the documentation provided with the unit at the time of purchase. For additional
copies, consult your local Authorized Service Dealer for your specific generator model.
Model 8 kW 11 kW 16 kW 20 kW 22 kW
Rated Voltage 240
Rated Maximum Load
Current (Amps) at 240 Volts
(LP)*
33.3 45.8 66.6 83.3 91.7
Main Circuit Breaker 35 Amp 50 Amp 65 Amp 90 Amp 100 Amp
Phase 1
Rated AC Frequency 60 Hz
Battery Requirement Group 26R, 12 Volts and 525 CCA Minimum (Generac Part No. 0H3421S)
Weight (unit only in lbs./kilos) 360/163.3 407/184.6 471/213.6 451/204.6 476/216
Enclosure Steel Steel Steel Steel Aluminum
Normal Operating Range
This unit is tested in accordance to UL 2200 standards with an operating temperature of -20 ºF (-29 ºC) to 122 ºF (50
ºC). For areas where temperatures fall below 32 ºF (0 ºC) a cold weather kit is required. When operated above 77 ºF
(25 ºC) there may be a decrease in engine power. Please reference the engine specifications section.
These generators are rated in accordance with UL 2200, Safety Standard for Stationary Engine Generator Assemblies, and CSA-C22.2 No. 100-04
Standard for Motors and Generators.
* Natural Gas ratings will depend on specific fuel Btu/joules content. Typical derates are between 10-20% off the LP gas rating.
** Circuits to be moved must be protected by same size breaker. For example, a 15 Amp circuit in the main panel must be a 15 Amp circuit in the trans-
fer switch.
Model 8 kW 11 kW 16 kW 20 kW 22 kW
Type of Engine GH-410 GT-530 GT-990 GT-999 GT-999
Number of Cylinders 1 2 2 2 2
Displacement 410 cc 530 cc 992 cc 999 cc 999 cc
Cylinder Block Aluminum w/Cast Iron Sleeve
Recommended Spark Plug RC14YC BPR6HS RC14YC RC12YC RC12YC
Spark Plug Gap 0.76 mm (0.030 in) 0.76 mm (0.030 in) 1.02 mm (0.040 in) 0.76 mm (0.030 in) 0.76 mm (0.030 in)
Starter 12 VDC
Oil Capacity Including Filter Approx. 1.5 Qt/1.4 L Approx. 1.7 Qt/1.6 L Approx. 1.9 Qt/1.8 L Approx. 1.9 Qt/1.8 L Approx. 1.9 Qt/1.8 L
Recommended Oil Filter Part #070185E
Recommended Air Filter Part #0E9371A Part #0E9371A Part #0J8478 Part #0J8478 Part #0J8478
Engine power is subject to and limited by such factors as fuel Btu/joules content, ambient temperature and altitude. Engine power decreases about 3.5
percent for each 1,000 feet (304.8 meters) above sea level, and also will decrease about 1 percent for each 6 ºC (10 ºF) above 15 ºC (60 ºF) ambient
temperature.