I definitely want to find a diesel one of these days, not many for sale in my area. I've wondered about the power difference, the D640 has more displacement, larger bore and longer stroke. HP so often doesn't tell the story with diesels, but in this case I would expect the D640 to have a noticeable difference in power to the D600. Guess so far I've limited my searches to 1772 and 1782's, maybe I ought to consider a 1572 if it comes along.
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1864 w/48" deck, 2084 w/54" deck + 54" blade, 3204 w/48" deck
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