I have a 2004 honda bf50a that I just bought. Seems to idle a bit rough and a little fast, about 1400 rpm. Top plug was black and slightly wet, mid plug was a little cleaner and not wet, lower plug was fairly clean. I suspected the bustarter on the top carb. Checked resistance, about 24 ohms, supply voltage was about 8 volts. It does get warm and motor starts cold fine. I turned the idle down to 1000 and motor runs ok ,a little rough at idle, and seems to shudder when accelerating from a long idle. My question, is 8v normal to the bystarter I read about someone else having around 7v but didn't find out if this was normal.