Issue started while mowing 2 acre lawn. Tried: new fuel and air filters, new plugs, new fuel pump. Still surging whether under load or not, at all throttle positions.
John Deere LX 188
New problem that appeared after lunch. Mowed about 1 Ac before lunch, everything good. After lunch, engine declines in RPMs when mower deck is cutting grass. If engaged but wheels not moving forward mower spins up nicely. But as I move forward RPMs decline unless forward...