I've been working on a Briggs 5hp flathead for a little while now, and since I've owned it I know the wall of the cylinder and sides of the piston are pretty bad scored. The engine still runs pretty good, but when you take off from a stop it smokes quite a bit. It looks like the guy I got it from ran it lean and low on oil, I'll post some pictures when I get home. I'm confident that I can fix the cylinder with a hone, but the piston's pretty rough. I looked it up and I found this video on a guy using a Scotchbrite pad and WD-40 to fix one (How to get scratches out of your pistons ! (youtube.com) ). At some point I know I want to upgrade to a predator motor, but I don't want to spend that kind of money rn. Any thoughts?