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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.

Steve Ownby
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2003 Monaco Signature
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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.

Charlie, Jackie
w/Lucy the Dog & Jack the Cat
2008 Newmar Mountain Aire 4529
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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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