Thanks Steve. The ISM II designation was in athe original literature of a 2005 Navigator. I agree in that the ISM motor was probably the best motor ever put in a motorhome. According to some Cummins mechanics I have talked to it is a 800,000+ mile motor and the ISL was a 475,000+ mile motor. Needless to say even full time driving one should not wear out either if one stays away from that 2006 ISL with the bad rods.
So have you had any problems with your ISM?
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Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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