John Deere 425 - firing on one cylinder
I have a JD425 with 20hp water cooled Kawasaki engine. It's always run strong. It intermittently started loosing a lot of power (bogging down) when mowing. I ran thru it and discovered that there's no spark on the right cylinder.
I've replaced both spark plugs & right coil pack. Piston goes up & down when turning motor by hand, & running with OHV cover off I can see that the valves open & close while running... just no spark about 95% of the time on the right side. I'm stumped. Any ideas? Thanks!