Bing, you might be able to retrofit the MV for a diesel. All it would take is a new gas tank and entirely new engine. Maybe you could design one in your free time. You could take one out of a smaller Kubota tractor and fit it into the Polaris. Those Kubota engines will go all day on a drop of gas and will pull and pull and pull.[img]i/expressions/face-icon-small-happy.gif[/img][img]i/expressions/face-icon-small-wink.gif[/img]