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Senior Member
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Discussion Starter #1
Not sure if this belongs here or IN Heavy Duty but ,my freinds looking at a Class A winnebago. It has:
· CUMMINS ISC 275 HP TURBO DIESEL ENGINE

· ALLISON SIX SPEED AUTOMATIC TRANSMISSION

Is this Motor the 5.9 or 8.3 ?
Any know issues with them ?
 

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Senior Member
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683 Posts
It's the 8.3L, electronic. The most frequent failures on the earlier engines were related to fuel system components on the high pressure side. Campaign 9901 corrected the problem. Your friend should get the engine S/N and call a local Cummins dealer/distributor to see if the campaign was ever done to this engine. Other than the early fuel system problems, I think it's a good engine. Would love to find a way to get it into my Ex. :haha

Technically, the ISC is considered medium duty.
 
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