ISB6.7 for School Bus (2013)

Power 200 - 300 hp
149 - 224 kW
Certification EPA 2013


Jumping A Grade.

Cummins is ahead of the curve in developing diesel engines that deliver everything from better fuel economy to improved reliability and durability. We’re even meeting 2014 greenhouse gas (GHG) emissions standards a year ahead of schedule. That’s like being smart enough to jump a grade in school. What’s more, the ISB6.7 is the cleanest diesel engine available for the school bus market.

Better. At The Pump. 

The fuel economy story is even better. Cummins ISB6.7 already provides best-in-class fuel economy, and it’s getting up to 2% better in 2013. The addition of an air intake throttle makes our EGR system more efficient. The reduction in parasitic losses increases fuel economy and lowers operating costs.

Better. For The Environment.

Cummins offers the cleanest ratings of any diesel engines in school buses. Emissions are managed by the proven Cummins Aftertreatment System. In-house development of the entire integrated unit from air handling to exhaust aftertreatment allows us to optimize engine performance and emissions control better than other engine manufacturers. The 2013 ISB6.7 will come equipped with On-Board Diagnostics to monitor performance of the aftertreatment system. The Cummins On-Board Diagnostics system has been proven in thousands of vehicles since 2007.

Better. On The Road. 

There’s no compromise in performance, as the ISB6.7 is rated at 200-300 hp (149-224 kW) with up to 660 lb-ft (895 N•m) of peak torque. Multiple injection events per cycle make this engine quiet and smooth to operate, so bus drivers can be more alert and aware of traffic outside – and students inside the bus. Plus, maintenance intervals for the ISB6.7 are virtually unchanged across the board.

Better. For Years Ahead.

Our confidence in the Cummins ISB6.7 is evident in our comprehensive base warranty, one of the best in the industry, and our new extended coverage plans. Lock in up to 10 years of coverage with complete confidence in its robust design and quality manufacturing.

Better. Every Subject.

Cummins ISB6.7 is designed to deliver better performance, reliability, fuel economy and durability. It is easily customized using the many electronic engine features and adjustable parameters.  Maintenance is virtually unchanged from previous models. Plus, every ISB6.7 is backed by the largest and most capable customer support network in the business.

Considering a Cummins engine purchase? For more information including pricing and additional technical information, please contact your Cummins representative. If you need help finding a representative, the Cummins Sales and Service Locator tool can help. 

Advertised Horsepower 200-300 hp 149-224 kW
Peak Torque 520-660 lb-ft 705-895 Nm
Governed Speed 2600 rpm
Clutch Engagement Torque 400 lb-ft 542 Nm
Number of Cylinders 6
System Weight 1357 lb 616 kg
Engine (Dry) 1150 lb 522 kg
Aftertreatment  System* 207 lb 94 kg

*Increase over standard muffler and does not include chassis OEM-supplied components.

Engine Model Advertised Horsepower (kW) Peak Torque lb-ft (Nm) @ rpm
ISB6.7 300 300 (224) 660 (896) @ 1600
ISB6.7 280 280 (209) 660 (896) @ 1600
ISB6.7 260 260 (194) 660 (896) @ 1600
ISB6.7 250 250 (187) 660 (896) @ 1600
ISB6.7 240 240 (179) 560 (760) @ 1600
ISB6.7 220 220 (164) 520 (706) @ 1600
ISB6.7 200 200 (149) 520 (706) @ 1600
Maintenance Item Miles/Kilometers Hours Months
Oil & Filter 15,000 mi
24,000 km
500 6
Fuel Filter 15,000 mi
24,000 km
500 6
Standard Coolant 60,000 mi
96,000 km
2,000 24
Valve Adjustment 150,000 mi
240,000 km
5,000 48
Crankcase Breather Filter  60,000 mi
96,000 km
2,000  24
DEF Filter   200,000 mi
321,500 km
6,500  N/A
Particulate Filter 200,000 mi
321,500k m
6,500 N/A 

For complete maintenance information, please consult your Owner’s Manual or Operations and Maintenance Manual, available on QuickServe Online.

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