I pulled the head off. Lots of carbon, including large chunks on the head and block; the pistons and valves had some layers also. Piston number 3 has a small hairline crack on one side that goes over about an inch to the edge...like a "corner" of the piston is cracked and slightly bent down.

The cylinder wall has a noticable "streak", but I wouldnt say it is gouged.

I can get a piston for 27 bucks, but that means tearing the engine down, which i would like to avoid. This is a forklift that will run less than an hour per month on average, I'm guessing.

I cleaned the carbon off. I almost wanna just throw it back together and see if it runs. I think found the inspection cover on the bellhousing.