(snip) I know the system you speak of on the Cub. Cub's parent company, MTD, introduced it a few years ago. I can speak of bitter experience of the need to use resistor spark plugs in whatever engine is used on these units. They wont mow in reverse with non-resistor plugs, or at least they didn't when I worked for an entire week just to discover the fact. Got a nice, MTD jacket once I figured it out. Didn't help my ego much, though.
With the Cub, I engage the rio switch when I start mowing, and leave it on until I stop the PTO. What does resistor plugs have to do with it? (it's a twin) Is the rio switch operated by RF signal?
