ISL9 for Motorcoach (EPA 2010)

Power 345 - 380 hp
257 - 283 kW
Torque 1150 - 1300 lb-ft
1559 - 1763 N•m
Certification EPA 2010


Expect the same high level of performance, reliability and fuel economy with the Cummins ISL9 EPA 2010 engine as you do with today’s ISL.  The ISL9 has one of the highest power-to-weight ratios in its class with heavy-duty features like replaceable wet liners.  It also features the XPI fuel system – the same technology that’s used in the ISX15.  These advances combined with an improved Electronic Control Module (ECM) and improved air flow, allow the ISL9 to run stronger and with greater responsiveness than ever before.   Ratings range from 345-380 hp with a maximum 1300 lb-ft of torque.

How did we make these improvements and still meet stringent 2010 emissions standards?  With a totally integrated system, that’s how.  Everything from the advanced fuel injection technology, improved cooled EGR subsystem and Cummins VGT™ Turbocharger to the proven Cummins Aftertreatment System that includes Selective Catalytic Reduction (SCR) technology has been engineered and manufactured in-house.  The result is a totally integrated system delivering an engine that provides near-zero emissions without compromising performance.

And that’s just a few of the features the ISL9 has to offer to help both your vehicles, and your business, run smoother.These engines are designed to keep your maintenance to a minimum and your productivity in overdrive.

All backed by the best customer support in the business.

Advertised Horsepower  345-380 hp  257-283 kW 
Peak Torque  1150-1300 lb-ft  1560-1763 N•m 
Governed Speed  2100 rpm 
Clutch Engagement Torque 575 lb-ft  780 N•m 
Number of Cylinders 
Oil System Capacity  7.3 U.S. gallons  27.6 liters 
System Weight  1,850 lb  839 kg 
Engine (Dry)  1,650 lb  749 kg 
Aftertreatment System*  200 lb  90 kg 

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

Engine Model  Advertised Horsepower (kW)  Peak Torque lb-ft (N•m) @ rpm 
ISL9 380  380 (283)  1300 (1763) @ 1400 
ISL9 370  370 (276)  1250 (1695) @ 1400 
ISL9 345  345 (257)  1150 (1559) @ 1400 
ISL9 330 H  330 (246)   1050 (1425) @ 1500 
Maintenance Item  Miles/Kilometers  Hours  Months 
Oil and Filter*  20,000 mi
32,000 km 
Primary Fuel Filter**  20,000 mi
32,000 km  
Secondary Fuel Filter  40,000 mi
64,000 km 
1,000  12 
Coolant Filter  None***  None***   None***  
Overhead Adjustment  150,000 mi
241,500 km 
5,000  48 
Standard Coolant Change****  80,000 mi
128,000 km 
2,000  24 
Coalescing Filter  Every 3rd to 4th Oil Change Interval 
DEF Filter  200,000 mi
320,000 km 
Particulate Filter Cleaning  200,000 mi (320,000 km) or 6,500 hours

*Assuming normal duty cycle for recreational vehicle applications
**OEM-supplied; intervals may vary
***If engine is equipped with an optional coolant filter, it will need to be replaced at the same intervals as the oil filter.  Regardless if the engine is or is not equipped with a coolant filter, SCA/DCA additive levels must be checked according to the interval listed in the Owners Manual.
****Extended coolant drain/flush/fill intervals may be followed when certain requirements are met.

For more information on these requirements, refer to the Cummins Coolant Requirements and Maintenance Service, Bulletin 3666132.

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