A bit of a mystery hopefully solved on the 129. Last week, while testing it out after doing the hydro lift conversion and a quick freshening up of the engine, the engine would suddenly go into a misfire mode. All was well when I was putting it through its paces cutting a strip of 2 week old grass, when the engine suddenly went into a misfire mode. I backed off and the engine would run smoothly. I limped it back to the garage and ran the carb jets in and out a couple of times, and it seemed to smooth out.
Cutting the grass last night I had a repeat performance. Again, some carb fiddlin seemed to straighten things out, but I decided to investigate a charging system problem, as the voltage was only running about 12.4 volts or so. I spent the next couple of hours fiddling with the voltage regulator, and it seemed like I was chasing my tail, it would either be like it wasn't charging, or it was reading almost 17 volts when I briefly ran the engine to check the results of adjustments. I decided to called it a night and resolved to pull the regulator off of the old 102 and put it in the 129 today, after putting brakes on the Accord.
I took care of business with the Accord, then went to work on the 129. The old 102 regulator went onto the 129, and it registered 13.2 volts right out of the box, close enough for me. Mowing the rest of the lawn went smoothly, I think I have both the regulator and the misfire issues under control now, but I would like to try to repair the old regulator if I can. I also am having a problem with the throttle control slipping on me, I've only noticed it since doing the lift conversion. Well, always something to do to these tractors it seems!