Years of Production and available Horse Power
L10 = 1983 to 1991 (240 to 320 hp)
L10 CELECT = 1992 to 1998 (280 to 350 hp)
M11 CELECT = 1994 to 1995 (280 to 350 hp)
M11 CELECT Plus = 1996 to 1998 (280 to 450 hp)
ISM (non-EGR) = 1999 to 2003 (280 to 450 hp)
ISM (EGR) = 2004 to 2010 (280 to 500 hp)
Cummins plans to phase out the ISM for 2011 in favor of the 11.9-liter version of their ISX series.
In 1996, Cummins added electronic controls to improve efficiency. This model became known as the M11 Plus.
The M11 Plus became the ISM when Cummins applied its Interact System (hence the “IS” in ISM) to the M11 Plus to further improve the engine
Designed as a replacement for the original M11 engine, the Cummins ISM began with the CM570 fuel system and progressed with the following:
1.) In 2002, upgraded to the CM875 fuel system which included an EGR valve for EPA emission compliance.
2.) In 2007, upgraded to the CM876 fuel system. This fuel system still includes the EGR, but also added a Diesel Particulate Filter (DPF) to conform to the new EPA standards.
Cummins Engine Specifications
ISB The ISB XT combines the performance of 350 horsepower and the industry-leading fuel economy of the legendary ISB to set a new standard for the 350 hp motorhome. The “XT” in its name refers to the extra displacement (6.7 liters), extra power for acceleration and climbing hills, and extra stopping power of the integrated exhaust brake from its Variable Geometry Turbocharger. The ISB family also includes 340 and 300 horsepower ratings for motorhome applications along with the ISB AD models which are used in front-engine diesel chassis.
| ISB 340 EPA 2007 Motorhome Spec Sheet | ||
| Specifications. | EPA 07 ISB | |
| Advertised Horsepower | 300-350 hp | 224-261 kW |
| Peak Torque lb-ft (N•m) @ rpm | 350hp – 750 (1017) @ 1800 | |
| Peak Torque lb-ft (N•m) @ rpm | 340hp – 660 (895) @ 1600 | |
| Peak Torque lb-ft (N•m) @ rpm | 325hp – 750 (1017) @ 1800 | |
| Peak Torque lb-ft (N•m) @ rpm | 300hp – 620 (841) @ 1600 | |
| Governed Speed | 340 and 350hp 2600 rpm 300 and 325hp 2800 rpm | |
| Clutch Engagement Torque | 400 lb-ft | 542 N.m |
| Number of Cylinders | 6 | |
| Oil System Capacity | 4 U.S. gallons | 15.1 liters |
| System Weight | 1,190 lb | 540 kg |
| Engine (Dry) | 1,150 lb | 522 kg |
| Aftertreatment* | 40 lb | 18 kg |
| *Increase over Standard muffler. |
ISC Built on a reputation of delivering additional performance when a little extra is needed. With up to 360 horsepower and 1050 lb-ft of torque, the ISC is designed to provide the performance to deal with heavier loads and steeper grades.
| ISC 360 EPA 2007 Motorhome Spec Sheet | ||
| Specifications. | EPA 07 ISC | |
| Advertised Horsepower | 330-360 bhp | 246-268 kW |
| Peak Torque lb-ft (N•m) @ rpm | 360 hp – 1050 (1424) @ 1400 | |
| Peak Torque lb-ft (N•m) @ rpm | 330 hp – 1000 (1356) @ 1400 | |
| Governed Speed | 2200 rpm | |
| Clutch Engagement Torque | 500 lb-ft | 678 N.m |
| Number of Cylinders | 6 | |
| Oil System Capacity | 6.3 U.S. gallons | 23.8 liters |
| System Weight | 1,680 lb | 762 kg |
| Engine (Dry) | 1,630 lb | 739 kg |
| Aftertreatment* | 50 lb | 23 kg |
| *Increase over Standard muffler. |
ISL The ideal engine for larger luxury motorhomes. With power up to 425 hp and 1200 lb-ft of torque, the ISL can accelerate at any speed and quickly climb the steepest grades even when towing. The ISL offers a very strong engine brake for extra braking capacity and added driver control. With 20,000 miles (32,000 km) oil change intervals, the ISL saves money and time when it comes to maintenance.
| ISL 400 EPA 2007 Motorhome Spec Sheet | ||
| ISL 425 EPA 2007 Motorhome Spec Sheet | ||
| Specifications. | EPA 07 ISL | |
| Advertised Horsepower | 370-425 bhp | 276-317 kW |
| Peak Torque lb-ft (N•m) @ rpm | 425hp – 1200 (2237) @ 1300 | |
| Peak Torque lb-ft (N•m) @ rpm | 400hp – 1200 (1966) @ 1300 | |
| Peak Torque lb-ft (N•m) @ rpm | 370hp – 1200 (2237) @ 1300 | |
| 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 | 27.6 liters |
| System Weight | 1,685 lb | 765 kg |
| Engine (Dry) | 1,635 lb | 742 kg |
| Aftertreatment* | 50 lb | 23 kg |
ISM Designed for long-distance cruising up and down the interstate. With the highest power-to-weight ratio in its class, the ISM 450 and 500 horsepower ratings let you climb every mountain.
| ISM 500 EPA 2007 Motorhome Spec Sheet | ||
| Specifications. | EPA 07 ISM | |
| Advertised Horsepower | 450-500 hp | 336-373 kW |
| Peak Torque lb-ft (N•m) @ rpm | 1550 (2102) @ 1200 | 2102 N.m |
| Governed Speed | 2100 rpm | |
| Clutch Engagement Torque | 700 lb-ft | 949 N.m |
| Number of Cylinders | 6 | |
| Oil System Capacity | 10.2 U.S. gallons | 38.6 liters |
| Engine (Dry) | 2,206 lb | 1,000 kg |
ISX Dual overhead cams, an integrated engine brake, and 525-650 horsepower from the most fuel-efficient engine in its class.
| ISX 650 EPA 2007 Motorhome Spec Sheet | ||
| ISX 600 EPA 2007 Motorhome Spec Sheet | ||
| Specifications. | EPA 07 ISX | |
| Advertised Horsepower | 525-650 hp | 392-447 kW |
| Peak Torque lb-ft (N•m) @ rpm | 650hp – 1950 (2644) @ 1300 | |
| Peak Torque lb-ft (N•m) @ rpm | 600hp -1850 (2508) @ 1400 | |
| Peak Torque lb-ft (N•m) @ rpm | 525hp – 1650 (2237) @ 1400 | |
| Governed Speed | 525hp – 2000 rpm 600 and 625hp 2100 rpm | |
| Clutch Engagement Torque | 1000 lb-ft | 1356 N.m |
| Number of Cylinders | 6 | |
| Oil System Capacity | 14 U.S. gallons | 52.9 liters |
| System Weight | 3,093 lb | 1,403 kg |
| Engine Weight (Dry) | 3,021 lb | 1,370 kg |
| Aftertreatment* | 72 lb | 33 kg |
| *Increase over today’s muffler. |
Cummins Component Manufacturers’ Addresses
ISM M-11
Air Compressor
Bendix Heavy Vehicles Systems
Div. of Allied Automotive
901 Cleveland Street
Elyria, OH 44036
Telephone: (216) 329-9000
Holset Engineering Co., Inc.
1320 Kemper Meadow Drive
Suite 500
Cincinnati, OH 45240
Telephone: (513) 825-9600
Midland-Grau Heavy Duty Systems
Heavy Duty Group Headquarters
10930 N. Pamona Avenue
Kansas City, MO 64153
Telephone: (816) 891-2470
Air Cylinders
Bendix Ltd.
Douglas Road
Kingswood
Bristol England
Telephone: 0117-671881
Catching Engineering
1733 North 25th Avenue
Melrose Park, IL 60160
Telephone: (708) 344-2334
TEC – Hackett Inc.
8909 Rawles Avenue
Indianapolis, IN 46219
Telephone: (317) 895-3670
Air Heaters
Fleetguard, Inc.
1200 Fleetguard Road
Cookeville, TN 38502
Telephone: (615) 526-9551
Kim Hotstart Co.
P.O. Box 11245
Spokane, WA 99211-0245
Telephone: (509) 534-6171
Air Starting Motors
Ingersoll Rand
Chorley New Road
Horwich
Bolton Lancashire England BL66JN
Telephone: 01204-65544
Ingersoll-Rand Engine
Starting Systems
888 Industrial Drive
Elmhurst, IL 60126
Telephone: (708) 530-3875
StartMaster Air Starting Systems
A Division of Sycon Corporation
9595 Cheney Avenue
P. O. Box 491 Marion, OH 43302
Telephone: (614) 382-5771
Alternators
Robert Bosch Ltd.
P.O. Box 98 Broadwater Park North Orbital Road
Denham Uxbridge Middlesex UD9 5HG England
Telephone: 01895-833633
Butec Electrics
Cleveland Road Leyland PR51XB England
Telephone: 01744-21663
C.A.V. Electrical Equipment
P.O. Box 36 Warple Way London W37SS England
Telephone: 01-743-3111
A.C. Delco Components Group
Civic Offices Central Milton Keynes MK93EL England
Telephone: 01908-66001
C. E. Niehoff & Co.
2021 Lee Street Evanston, IL 60202
Telephone: (708) 866-6030
Delco-Remy America
2401 Columbus Avenue
P.O. Box 2439 Anderson, IN 46018
Telephone: (317) 646-3528
Leece-Neville Corp.
400 Main Street Arcade, NY 14009
Telephone: (716) 492-1700
Auxiliary Brakes
The Jacobs Manufacturing Company Vehicle Equipment Division
22 East Dudley Town Road Bloomfield, CT 06002
Telephone: (203) 243-1441
Belts
Dayco Rubber U.K.
Sheffield Street Stockport Cheshire SK41RV England ·
Telephone: 061-432-516
T.B.A. Belting Ltd.
P.O. Box 77 Wigan Lancashire WN24XQ England
Telephone: 01942-59221
Dayco Mfg. Belt Technical Center
1955 Enterprise Rochester Hills, MI 48309
Telephone: (810) 853-8300
Gates Rubber Company
900 S. Broadway
Denver, CO 80217
Goodyear Tire and Rubber Company Industrial Products
Div. 2601 Fortune Circle East Indianapolis, IN 46241
Telephone: (317) 898-4170
Catalytic Convertors
Donaldson Company, Inc.
1400 West 94th Street
P.O. Box 1299 Minneapolis, MN 55440
Telephone: (612) 887-3835
Nelson Division Exhaust and Filtration Systems
1801 U.S. Highway 51 P.o.. Box 428 Stoughton, WI 53589
Telephone: (608) 873-4200
Walker Manufacturing
3901 Willis Road
P.o. Box 157 Grass Lake, MI 49240
Telephone: (517) 522-5500
Coolant Level Switches
Robertshaw Controls Company
p.o. Box 400 Knoxville, TN 37901
Telephone: (216) 885-1773
Clutches
Twin Disc International S.A.
Chaussee de Namur Nivelles Belgium
Telephone: 067-224941
Twin Disc Incorporated
1328 Racine Street Racine, WI 53403
Telephone: (414) 634-1981
Coolant Heaters
Fleetguard, Inc.
1200 Fleetguard Road Cookeville, TN 38502
Telephone: (615) 526-9551
Drive Plates
Detroit Diesel Allison Division of General Motors Corporation
P.o. Box 894 Indianapolis, IN 46206-0894
Telephone: (317) 242-5000
Electric Starting Motors
Butec Electrics
Cleveland Road Leyland PR51XB England
Telephone: 01744-21663
C.A.v. Electrical Equipment
p.o. Box 36 Warple Way London W37SS England
Telephone: 01-743-3111
A.C. Delco Components Group
Civic Offices Central Milton Keynes MK93EL England
Telephone: 0908-66001
Delco-Remy America
2401 Columbus Avenue P.o. Box 2439 Anderson, IN 46018
Telephone: (317) 646-3528
Leece-Neville Corp.
400 Main Street Arcade, NY 14009
Telephone: (716) 492-1700
Nippondenso Inc.
2477 Denso Drive p.o. Box 5133 Southfield, MI 48086
Telephone: (313) 350-7500
Electronic Switches
Cutler-Hammer Products Eaton Corporation
4201 N. 27th Street Milwaukee, WI 53216
Telephone: (414) 449-6600
Engine Protection Controls
Flight Systems Headquarters Hempt Road
P.O. Box 25 Mechanicsburg, PA 17055
Telephone: (717) 697-0333
The Nason Company
2810 Blue Ridge Blvd.
West Union, SC 29696
Telephone: (803) 638-9521
Teddington Industrial Equipment
Windmill Road
Sunburn on Thames
Middlesex TW167HF England
Telephone: 09327-85500
Fan Clutches
Kysor Cooling Systems N.A.
6040 West 62nd Street Indianapolis, IN 46278
Telephone: (317) 328-3330
Holset Engineering Co. Ltd.
P.O. Box A9 Turnbridge Huddersfield, West Yorkshire England HD6 7RD
Telephone: 01484-22244
Horton Industries, Inc.
P.O. Box 9455 Minneapolis, MN 55440
Telephone: (612) 378-6410
Rockford Clutch Company 1200 Windsor Road
P.O. Box 2908 Rockford, IL 61132-2908
Telephone: (815) 633-7460
Fans
Truflo Ltd.
Westwood Road Birmingham B67JF England
Telephone: 021-557-4101
Hayes-Albion Corporation
Jackson Manufacturing Plant 1999 Wildwood Avenue Jackson, MI 49202
Telephone: (517) 782-9421
Engineered Cooling Systems, Inc.
201 W. Carmel Drive Carmel, IN 46032
Telephone: (317) 846-3438
Brookside Corporation
P.O. Box 30 McCordsville, IN 46055
Telephone: (317) 335-2014
TCF Aerovent Company
9100 Purdue Rd. , Suite 101 Indianapolis, IN 46268-1190
Telephone: (317) 872-0030
Kysor-Cadillac
1100 Wright Street Cadillac, MI 49601
Telephone: (616) 775-4681
Schwitzer
6040 West 62nd Street
P.O. Box 80-B Indianapolis, IN 46206
Telephone: (317) 328-3010
Fault Lamps
Cutler-Hammer Products Eaton Corporation
4201 N. 27th Street Milwaukee, WI 53216
Telephone: (414) 449-6600
Filters
Fleetguard International Corp.
Cavalry Hill Industrial Park Weedon Northampton NN7 4TD England
Telephone: 01327-41313
Fleetguard, Inc.
1200 Fleetguard Road Cookeville, TN 38502
Telephone: 1-800-22-Filters
(1-800-223-4583)
Flexplates
Corrugated Packing and Sheet Metal
Hamsterley Newcastle Upon Tyne England
Telephone: 01207-560-505
Allison Transmission Division of General Motors Corporation
P.O. Box 894 Indianapolis, IN 46206-0894
Telephone: (317) 242-5000
Midwest Mfg. Co.
29500 Southfield Road, Suite 122 Southfield, MI 48076
Telephone: (313) 642-5355
Wohlert Corporation
708 East Grand River Avenue
P.O. Box 20217 Lansing, MI 48901
Telephone: (517) 485-3750
Fuel Coolers
Hayden, Inc. 1531 Pomona Road
P.O. Box 848
Corona, CA 91718-0848
Telephone: (909) 736-2665
Fuel Pumps
Robert Bosch Corp. Automotive Group
2800 South 25th Ave. Broadview, IL 60153
Fuel Warmers
Fleetguard, Inc.
1200 Fleetguard Road Cookeville, TN 38502
Telephone: (615) 526-9551
Gauges
A.I.S. Dyffon Industrial Estate
Ystrad Mynach Hengoed Mid Glamorgan CF87XD England
Telephone: 01443-812791
Grasslin U.K. Ltd.
Vale Rise Tonbridge Kent TN91TB England
Telephone: 01732-359888
Icknield Instruments Ltd.
Grasslin U.K. Ltd.
Vale Rise Tonbridge Kent TN91TB England
Telephone: 01732-359888
Icknield Instruments Ltd.
Jubilee Road Letchworth Herts England
Telephone: 04626-5551
Superb Tool and Gauge Co.
21 Princip Street Birmingham B461E England
Telephone: 021-359-4876
Kabi Electrical and Plastics
Cranborne Road Potters Bar Herts EN63JP England
Telephone: 01707-53444
Datcon Instruments
P.O. Box 128 East Petersburg, PA 17520
Telephone: (717) 569-5713
Rochester Gauges, Inc.
11616 Harry Hines Blvd.
P.O. Box 29242 Dallas, TX 75229
Telephone: (214) 241-2161
Governors
Woodward Governors Ltd.
P.O. Box 15 663/664 Ajax Avenue
Slough Bucks SL14DD England
Telephone: 01753-26835
Woodward Governor Co.
P.O. Box 1519 Fort Collins, CO 80522
Telephone: (303) 482-5811 (800) 523-2831
Barber Colman Co.
1354 Clifford Avenue Loves Park, IL 61132
Telephone: (815) 637-3000
United Technologies Diesel Systems
1000 Jorie Blvd. Suite 111 Oak Brook, IL 69521
Telephone: (312) 325-2020
Heat Sleeves
Bentley Harris Manufacturing Co.
100 Bentley Harris Way Gordonville, TN 38563
Telephone: (313) 348-5779
Hydraulic and Power Steering Pumps
Hobourn Automotive Temple Farm Works
Priory Road Strood Rochester Kent, England ME22BD
Telephone: 01634-71773
Honeywell Control Systems Ltd.
Honeywell House Charles Square Bracknell Berks RG12 1EB
Telephone: 01344-4245
Sundstrand Hydratec Ltd.
Cheney Manor Trading Estate Swindon Wiltshire SN22PZ England
Telephone: 01793-30101
Sperry Vickers
P.O. Box 302 Troy, MI 48084
Telephone: (313) 280-3000
Z.F.
P.O. Box 1340
Grafvonsoden Strasse 5-9 D7070 Schwaebisch Gmuend Germany
Telephone: 7070-7171-31510
In-Line Connectors
Pioneer-Standard Electronics, Inc.
5440 Neiman Parkway Solon, OH 44139
Telephone: (216) 349-1300
Deutsch Industrial Products Division
37140 Industrial Avenue Hemet, CA 92343
Telephone: (714) 929-1200
Oil Heaters
Fleetguard, Inc.
1200 Fleetguard Road Cookeville, TN 38502
Telephone: (615) 526-9551
Kim Hotstart Co.
P.O. Box 11245 Spokane, WA 99211-0245
Telephone: (509) 534-6171
Prelubrication Systems
RPM Industries, Inc.
Suite 109 55 Hickory Street Washington, PA 15301
Telephone: (412) 228-5130
Radiators
JB Radiator Specialties, Inc.
P.O. Box 292087 Sacramento, CA 95829-2087
Telephone: (916) 381-4791
The G&O Manufacturing Company
100 Gando Drive
p. O. Box 1204 New Haven, CT 06505-1204
Telephone: (203) 562-5121
Young Radiator Company
2825 Four Mile Road Racine, WI 53404
Telephone: (910) 271-2397
Land M Radiator, Inc.
1414 East 37th Street Hibbing, MN 55746
Telephone: (218) 263-8993
Throttle Assemblies
Williams Controls, Inc.
14100 SW 72nd Avenue Portland, OR 97224
Telephone: (503) 684-8600
Torque Converters
Twin Disc International S.A.
Chaussee de Namur Nivelles Belgium
Telephone: 067-224941
Twin Disc Incorporated
1328 Racine Street Racine, WI 53403-1758
Telephone: (414) 634-1981
Rockford Powertrain, Inc.
Off-Highway Systems 1200 Windsor Road
P. O. Box 2908 Rockford, IL 61132-2908
Telephone: (815) 633-7460
Modine Mfg. Co.
1500 DeKoven Avenue Racine, WI 53401
Telephone: (414) 636-1640