putting a Yanmar 3TNE68 in a 3TN66 4x6 gator ?????

Hello all, I just bought a used gator that has a bad motor. The 3TN66 that is in it has a badly cracked head and 3 ruined pistons, the block and the rest of the motor seem fine, and the rest of the Gator is in very good condition. I am having a hard time finding either a used replacement head for less than $500 or a running or parts 3TN66 that I can either swap in or use for parts. I have however found a Yanmar
3TNE68 in good running condition that would up the horse power a couple of horses. How difficult would this motor be to fit or is it even possible?? The guy with the motor says it should work,,, it's a few hours away from me and i have not made the trip yet, was hoping for some advice,,

Welcome to the Forum...i don't have a clue about your engine swap, but there are a few fellows on here that are John Deere Gator experts with the mechanicals of them and I am sure one of them will see your post and give you an answer...we like pics of here, no matter what style or year Gator you have, so if you get a chance, post up some pics of your Gator...we like progress tech pics a bunch, so if you do the engine swap, that information might be valuable to someone later on...that's what makes this Forum a cool place!!!

Good luck on getting it up and running again!!!

Larry in MD :Jestr:

I'll get some images, right now it is a really clean 6x4 gator on jack stands without a motor,,,,

Well I got the 68 motor, looks like it should be a pretty easy fit

switched the motor mounts, oil pan and oil pickup, have to get a new gator water pump and should be good to go

oh ya had to switch the exaust manifold as well, intake will work just fine

Any pictures?

Larry in ME

I'll get some the next day or 2 ,,, all done now except the upper radiator line