I was surprised by the fuel ratio 10 to 1. And the gearbox lubrication, an emulsion, water is meant to mix with the gear oil to lubricate the gearbox.
The one I tuned up and used , the gearbox was filled with grease, and the gears made a channel in the grease, so not much lubrication. I had to flush it out and put gearoil in.
There a lot on the net with manuals etc etc.
happy memories
speedy