The big parts washer uses kerosene and has a filtration system so the fluid stays clean as the wash nozzle puts out only clean fluid, no dirt. Usually remove seals and flush bearings and case out. No need for paper towels as the fluid stays clean and kerosene will not harm anything. Everything gets flushed out in the end. If I use the ultrasonic, it uses barsaw and change it often enough that dirt is not a problem. Just don't want to put painted parts in the ultrasonic, they usually won't be painted when they come out. Mainly use it for heads, cylinders, valves, carbs and such. If I cleaned that piston up it would cause too much piston gap and would also unbalance the piston front to back and make it want to cock in the bore. It is more than just a minor touch up. Rather just use new piston and ring and be done with it. I worked on cleaning everything last night and all is now clean. Have new seals in route and should be here today. Bearings are good and tight. Cylinder runout is less than .006in. which is in spec. Crank and rod in good shape. New piston and ring and saw will be good to go.
Brian
Brian
