Ring Set-std 696403

I disassembled the engine. I discovered that the rod had seized to the crank, but I had shut it down before the rod broke. I soaked the aluminum off from the crank using oven cleaner and then polished the crank in a lathe. I marked all the parts and found the engine to be in spec, so I installed the rings, slid the piston home, torqued th ... Read more e rod to spec and turned the engine over to check for binding. It was fine, so I torqued the rest of the crankcase and head to spec. After reinstalling the engine to the tractor I added oil and fuel and it fired it up. I let it run for a couple minutes keeping an eye on things. It seemed fine so I took it out mowing. I like to break an engine in under load with out abusing it, so I put it under a varying load at various throttle settings. After about an hour of this, it had quit smoking and was running nicely.

One additional thing I did that doesn\'t pertain to the original problem is bring the valves to spec. On this engine, the stems have to be ground a bit at a time. I also tapped the valves to the seats. I consider the project a success. The parts come with any unusual techniques or specs needed to do this.

1. Took off most parts (carb, starter, exhaust,ext)
2. Found socket to fit the flywheel nut and a breaker bar and worked to unseize it
3. Once I unseized it I found no compression from bad rings
4. I found the manual for my model engine to find the part number and bought the parts
5. Took the crank case cover off ... Read more and took the piston out
6. Put the new pistons rings on and clocked them
7. Oiled the piston and ring compressor, squeezed the rings and made sure the compressor was flush with the head and tapped the piston in
8. Scrapped the old gaskets off and replaced them
9. Put the other parts back on, put new oil in and changed the battery