I put a 4 cylinder 21hp. in my G4200 so it would have sufficient power for the snowblower.
The 3 cylinder should not be a problem as the G5200 and G6200 came with 3 cylinder diesels and the chassis is the same as yours as far as I know.
I have a good Z430 setting here on a skid if your interested. It is my take out.
Thanks for the reply. Do you still have a mower deck on your g4200? How did the 4 cylinder fit in your mower? Did you have to do a bunch of mods to make it fit? IIRC, you have a front end loader on your G4200, don't you? That ought to make things more interesting.
I know that the engine mounts are different between the 2 and 3 cyl, but that's a little parts scrounging / fab work, which is no problem. I guess the only other real differences could be the driveshaft length between the engine and hydro, along with the length of the engine causing differences at the front of the engine where the PTO pulleys are located. Now that I think about it, I guess the front of the engine (flywheel end) has to pretty much remain in the same location, as the PTO belt tensioner wouldn't work if it was in a different location. It just looks like there is too much room in front of the z430 to not use it for the 3 cylinder, compared to the rear end where everything is pretty compact against the radiator.
I guess I need some good pics of the engine in a G5200 / G6200. Thanks for the offer of the z430 - but if I'm gonna replace the engine, I'm thinking that I'll put the 3 cylinder in it. There's a D662 about 3 hours away for a good price that I think I'm going to snag.