Removed the pistons. Top piston has very little scoring. Bottom piston has pitting and heavy scoring. Both on the exhaust side. Now on the other side of the pistons, no scoring. The cylinders match everything above exactly in duplicate.
I have a 2001 Mercury jet20. "ran last spring" says the guy I got it from. Came with a service tag that read. Won't start. I pulled the plugs and they are getting good spark. Fuel is getting to the carburator and the Pistons have heavy scoring on the exhaust side. I know it needs new pistons and...
