The trash in that motor isn't rust or at least I don't think it is. I do believe it is part of the retainer from the bearing and maybe some sludge from water the motor had ingested that I didn't get out. It was put away and sat dormant for about a month then it wouldn't run. I installed the new bearings and did use the ceramics and put another cyl-piston in it. I will attempt to make sure the water gets completely out befor I store her again. I am not used to getting water out of my engines because this is my first run at boats. I usually fly and have probably 35-40 that never get after-run or ran dry. I usually de-fuel the tank and wipe em down and hang them back on the ceiling. Never had any problems with them and I got some pretty old engines on them. I guess boats require more maintenance. I would turn it up-ide down and run it to get the mess out of the crank-case but this engine really scares the mess out of me when it is ran out of the water. Turns up pretty hard and quick. How-ever, it is pretty simple to get the carb and back-plate off after a days run to see what is there.