Thanks mustang. A couple of questions though:
1. Is that air filter a foam pre-filter wrapped around a paper filter? If so, is the foam section oiled? Can it be removed to wash and re-oil it? Or do you have to replace the whole thing at frequent intervals?
2. How often does the oil filter have to be replaced? Does that coincide with every oil change?
3. Are you supposed to switch on then wait for the electric fuel pump to operate before starting the engine?
Aside from that, I suspect running slightly lean is something we are all having to learn to live with, due to increasingly stringent emissions regulations on mower engines that have only simple control systems and no exhaust after-treatment. Cars of the mid-1970s had similar emissions controls, and much the same issues with regard to slightly inferior driveability.
