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Old 09-22-2013, 09:55 AM   #15
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Originally Posted by edgray View Post
I hope you are right, Steve, as I've always thought the ISC was a tough, durable "mid-range" engine. Glad to know I wasn't "wrong" after all, but as I posted, the ISC is not shown in their motorhome-specific ad. FWIW, there a quite a few coaches with GVWRs >26K using the ISB, which I think is "penny wise & pound foolish". Ed
The only downside to the ISC is that a true Jake doesn't seem to ba available anymore. The ISL and ISC share a block and many parts are common so I expect that it's a marketing decision to build some more price cushion between to two engines.

The ISB is the mpg king in motorhomes unless the MF7 has taken that crown. The B engine performs great but at some point the weight gets to be too much for a pick up truck & light delivery vehicle engine.
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Old 09-23-2013, 12:16 PM   #16
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In my 08 MADP I've got an ISM 450, was told that it's the "big brother" of the ISL. They still make them, but not for MH's. Great engine all kinds of power.
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Old 09-24-2013, 11:30 PM   #17
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talked to a buddy at local shop sees very few pre 05 isl 400 ds
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