ISL G (EPA 07)

Power 250 - 320 hp
186 - 239 kW
Torque 660 - 1000 lb-ft
895 - 1356 N•m
Certification EPA 2007

Applications

Overview:

The ISL G spark ignited natural gas engine meets 2010 U.S. Environmental Protection Agency (EPA) and California Air Resources Board (CARB) emission standards.  The engine is based on the 8.9 liter diesel automotive (ISL) platform and shares many installation options with the diesel counterpart.

The ISL G features stoichiometric EGR combustion technology with spark ignition. Stoichiometric EGR combustion creates an oxygen free exhaust, enabling the use of maintenance-free three way catalyst after-treatment.  The ISL G offers performance benefits as well, with over 30% more torque at idle than its predecessor the C Gas Plus, the same rated speed as the ISL diesel and improved efficiency.

Advertised Horsepower 250-320 hp 186-239kW
Peak Torque 660-1000 lb-ft 895-1356 N•m
Governed Speed 2200 rpm  
Clutch Engagement Torque 550 lb-ft 746 N•m
Number of Cylinders 6  
Oil System Capacity 7.3 U.S. gallons 27.7 L  
Dry Engine Weight 1,625 lb 737 kg
ISLG EPA-2010 Transit Bus
 
Engine Model Peak Horsepower Peak Torque Governed RPM
ISL G 250 250 @ 2200  730 @ 1300 2200
ISL G 280 280 @ 2000 900 @ 1300 2200
ISL G 320 320 @ 2000 1000 @ 1300 2200

 

ISLG EPA- 2010 Truck and Bus
 
Engine Model Peak Horsepower Peak Torque Governed RPM
ISL G 250 250 @ 2200 730 @ 1300 2200
ISL G 260 260 @ 2200 660 @ 1300 2200
ISL G 280 280 @ 2000 900 @ 1300 2200
ISL G 300 300 @ 2100 860 @ 1300 2200
ISl G 320 320 @ 2000 1000 @1300 2200

 

 

 

  • ISL 8.9 block and major options shared with Diesel product
  • Viscous crankshaft vibration damper and related options
  • Cooled EGR system
  • Redesigned fuel module and engine intake air arrangement
  • Maintenance Free three-way catalyst after-treatment
  • Smaller frame, water cooled, wastegate turbocharger
  • Open crankcase breather system
  • New Cummins Engine Control Module (ECM)
  • Single 18.7 CFM or twin 30.4 CFM air compressor with increase drive through torque
  • Increased capacity front end accessory belt drives
  • Increased flow water pump
  • Enhanced reliability through product upgrades, and common components
  • Maintenance Intervals similar to ISL, with simplified maintenance to lower costs.
  • Combination bypass and full-flow oil filter
  • Same base warranty coverage as diesel.  Extended Warranty options available.


For more information visit the Cummins Westport website at www.cumminswestport.com.

Bus & Refuse      
Duty Cycles*  Miles
Kilometers 
Hours  Months 
Oil and Filter**  7,5000
12,000
500 
Fuel Filter  15,000
24,000 
1,000  12 
Coolant Filter  7,500
12,000 
500 
Spark Plugs  22,500
36,000 
1,500  18 
Coolant Change***  30,000
48,000 
2,000  24 
Valve Adjustment****  30,000
48,000 
2,000  24 
Truck <66,000 GVW         
Duty Cycles*  Miles
Kilometers 
Hours  Months 
Oil and Filter**  15,000
24,000
500 
Coolant Filter  15,000
24,000
500  6
Fuel Filter  30,000
48,000
1,000  12 
Spark Plugs  45,000
72,000
1,500  18 
Coolant Change  60,000
96,000
2,000  24 
Valve Adjustment*** 60,000
96,000
2,000  24 

*Assuming normal duty cycle
**Requires Natural Gas Engine Oil (CES20074)
***Do not change if SCA above 3
****Initial Overhead Adjustment at 1,000 hours

For complete maintenance interval and service information refer to the ISL G Owners Manual or to QuickServe Online.

 


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