I've been hearing lots of good things about the Kawasaki powered EFI twin...my dealer says it out powers the old daihatsu 31 3LC gas and the new Kubota 32.5 LC gas..all while using a about the same fuel as the 25 diesel. Also spoke with a guy using one blowing snow..he's trading his 4231 TD in in a second 4500p because the new kawi outpowers the 31TD and burns the same amount of fuel.. which BTW is about 75 cents more a gallon for diesel..very impressive.. Hope the long term durability is there...I'd never figure that engine to be the shining star of the 4500 series..