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Thank you for the videos and tips. I will be rebuilding the coils. I’ve been working to break down the motor to clean and soak in the evaprorust. I found a few pinholes in the gas tank that will need to be soldered before rebuilding. Good thing is they are on the bottom and out of sight. The only two things that are still giving me issues are the screws that hold the connecting rod to the crankshaft and the the thrust bearing. After many attempts with penetrating oil and heat I’ve decided to leave them in place and move on. Cylinder walls of both pistons are smooth and no gouges.
I’ve removed the cotter pin and pin that allows the thrust bearing to turn but can not get it to budge. It went into the evaprorust tonight for a good soak. Gear housing was pretty rusted and had a little water sitting in it.