My tune-up hasn't gone so well. No fire from the 225 yet. Can't seem to get spark, I've replaced most of the ignition system. It seems to be a wiring issue, a PO seems to have done some strange things with the coil's wiring. New plugs, wires, coil, cap, rotor, fuel filter, oil, PCV valve, air filter, points look new. Just gotta start probing the wiring I guess.