Hey Rick, while you are there....a question I'm sure you can answer. I was watching a doco on cruise liners last night, and it featured the maiden voyage of what was at the time, and maybe still is, the largest cruise liner in the world, the 'Oasis of the Seas'. Halfway out to St Thomas from Ft Lauderdale, the no 6 diesel engine was found to have varying compressions between the cylinders, an issue which had them all worried, as it was burning oil and there was potential they said, for total failure of the engine. However, they (allegedly) fixed it by altering the ignition spark a tad - all solved. That struck me as odd. Do any diesels use electronic ignition like that, or was the TV explanation a load of taddle...?