Originally Posted by laurier
Could you tell me what ISC, ISB and may be ISM stand for?
Are they different types diesel motors or just related to howm many HP?
I do have I believe a ISM . Is it a turbo type? Not much acceleration, probably because of the full MH weight.
The "IS" stands for Interact System, which is Cummins name for the electronic engine control system used by the company. The last digit identifies the Basic engine block which in turn will identify the displacement of the engine. There was generally a non electronic engine which used this same identifier in past years.
1. ISB was 5.9 liter, later 6.7 liter.
2. ISC is 8.3
3. ISL is 8.9
4. ISM is 10.8
5. ISX13 is 13
6. ISX15 is 15
Diesel engines due to their inherent characteristics don't accelerate in the same way as gasoline engines. I have heard it described as "gathering momentum". That being said, an ISX15 in a 26 k motorhome would be a rocket sled! If course, generally the ISX goes in a coach weighting 45k.
If you have an ISM you should have a true "Jake" compression brake with a high/low switch and an on/off switch. In my opinion, it's one of the diesel engines best suited to motorhome service.