I have a 2005 Sea Ray 390 Motoryacht with 420 hrs on it, and my stbd engine just sucked a valve (20 days out of extended warranty) and Cummins says they're not responsible. Anyone else heard of a problem like this? I can't believe a diesel engine could come apart after 420 hrs and not have an internal problem!
Thanks for the welcome. I haven't contacted Cummins yet. The GM at my Marine Max (Naples, FL) is going to the extended warranty people first, and I don't want to "end run" him. But I will go there if this doesn't work, maybe even if it does. I'm worried that if the warranty covers it, then the same thing happens to the port engine at say 500 hrs, Cummins won't cover it. But if they cover this one, they'll have to cover the other one. Does that make sense?
I'm not sure that your logic holds water. Hopefully, the problem is isolated and will not occur on the other engine. If you do some clicking around on the net, you may be able to ascertain if there is a pattern to this event.
My experience has been with Caterpillar and their myriad of problems with the 31 series engines. In that case, persistence paid off.
To all who care, Cummins has come through, and along with a little help from Sea Ray, a bunch of help from Marine Max, my out of pocket went from $24,000 to $3,300. Thats a big jump, and I'm a happy guy! Thanks all!
Cummins comes through 
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