First off a big hello from a new guy. I'm so glad to find this forum. I've got a Cub Cadet 70 with a tired Kohler k161. I've looked into rebuilding but for just a little more money I realized I could repower and get MORE POWER and move into diesel. Other forums I mentioned this idea on seemed to look at me as a lunatic.
I've got a couple old (currently a '78 and an '84) Mercedes-Benz diesel cars so I'm comfortable with burning oil and already have experience with getting 'em to start in the cold.
Anyway it looks like a1biofuel.net has about the best price you could ask for on the 10hp China diesel clone. It would also appear that they know what they're talking about with their manifold heater. Previous versions showed a glowplug just sticking into the manifold not doing a whole lot. I figure if its real cold I'll get one of those magnetic block heaters and warm everything up before starting. It doesn't get tremendously cold here but we do occasionally hit -20F.
The eventual plan is to build a little front end loader around this tractor. I already bought the plans, it looks pretty simple but I figured I should get my re-power worked out before going any further.
So for now its mostly a pipe dream as I haven't been able to rustle up any cash for this project, or rather every time I do something comes up. It looks like my cash flow might be improving in the near future so I'm planning ahead a bit more. Keeping myself on super-economy measures for now to help with purchases in the future.