This engine was partially disassembled and abandoned in a pile of junk. I was able to find almost all of the parts -- the orange color helped. I cleaned the carburetor and replaced the fuel pump gasket. The flywheel had spun on the crank and damaged the taper. It was suggested on a mail list (Smokstak.com) that lapping the flywheel on the crank may help. It took a few different lapping techniques to get something that worked. After lapping, I installed a new key which, so far, seems to work okay. The magneto was damaged but is still working. It is a breakerless magneto, so I don't need to fiddle with points, which is nice. There is a lot of side play on the crank. I may machine a spacer to take up the slop. Usually a side case gasket is used to adjust the side play, but there isn't nearly enough gasket thickness left to work with. The area without paint on the fan shroud is where the throttle control used to be. These engines had different controls depending on what equipment the engine was fitted to, so the control will need to wait. |
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The crank seal on this side leaks, so I need to put a replacement on my to-do list. |
I also need an air cleaner. |
This is the bent magneto after I tried to straighten the laminations. The magneto works okay, so I'll probably leave well enough alone. |
The taper shown here is before lapping. The crank doesn't really look much better now, but the taper will hold the flywheel after torquing the flywheel nut (starter clutch). Without the key the flywheel will rotate on the taper or come loose when the engine backfires, so the key is required. |
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Here is the flywheel taper before lapping. The taper is better after lapping, but the key slot is still pretty rough. Time will tell if I can get by without repairing the slot. I suppose I could machine a flywheel and crank slot on the other side if needed. |
