It was the ignition. The 1811 is running great. I warmed it up for 15 min at 1/4 throttle, another 15 at half. Ran it for an hour doing some light mowing on dry leafs. Gonna change the oil again and I think it should be good after that. You guys saved me a bunch of headache and some cash, thank you!!
One of the oil lines is leaking. Looking for some advice on replacing it. Would you build your own line or just buy a new one? The low oil sensor is also leaking from the top of it. Is that something that can be picked up at an auto parts store or a Cub dealer?
Here's a link to a video:
https://youtu.be/SfiXFZWwEgw