Today I bought a gear puller set at Harbor Freight and successfully removed the harmonic balancer from the crankshaft. The alignment key didn’t want to come out though, but I don’t think that will interfere with the disassembly.
I found that removing the flat washer and lock washer from the pulley bolt provided access for the entire pulley to slide off over the bolt.
Next i tried to disassemble the starter shaft. I removed the 5mm machine set screw from the starter shaft, but I could not figure out how to remove the shaft itself. The manual makes it look like it unscrews, but I am not sure.
I was taking some photos of the fuel lift pump, fuel pump and water pump and accidentally dropped the washer at the bottom if the fuel pump spring into the sump. I will need to drain that tomorrow, anyway.
I opened all the ports during the day to air the boat out and closed them this evening.
I had a chance tonight to look at some of the prices for Yanmar engine parts. Insane! $400 pistons and $65 push rods. $90 engine mounts. $65 for the water pump cover plate. $400 gasket sets. $200 piston ring sets
Even if I do find the cause of this engines seizure, replacing the rings and cylinder liner would probably set me back $400 or $500, assuming the connecting rod isn’t bent.
I cleaned up a bit, removing the electrical cord, fire extinguishers, and sheet lines from the boat. I found a nice outdoor electrical cord, 12′ long with outlets in line every 3′. I bought two.