Hi Travis! I think they ran it out of oil. Even though there is fresh oil in it now. Has only 338 hours on it. Mentioned a rod knock and- that they kept using it. I bought it from a guy that works in construction. Didn't get too hot at least. It turned over, but makes clunk noises, when I get the side cover off, the evidence will likely fall into my lap. Paid $1500 for it, seemed like a deal for what we need it for. Just hoping I can salvage what wasn't destroyed. May swap in a Vanguard twin if I need to. I have built many mower and ATV engines over the years, but never this setup.
The engine manual matches mine, very useful information, thanks for the link.
Here is one I found for the CVTech drive: https://americanlandmaster.com/pdfs/UTV/Service/CV Tech Cleaning Procedure (2-20662 & 2-20660).pdf
They have the tool, it's a bit spendy, hopefully I won't need it. http://usa.cvtech-aab.com/176-extracteur.html
Thanks Travis, here is what im working on, I believe it is a CVTech unit. I soaked it good with some PB blaster. Will see what I can do, I don't want to damage it coming off. Do I need to remove the large nut to remove it? I pulled a bolt out before taking these pics. Engine will be out tomorrow, gotta dig my hoist out in the back of the shop.