Grumpy, removed top flywheel, checked the points gap. THere was no gap! Set it to correct gap, power is back. Almost running too fast now, maybe some carb leak problem? Now i notice a banging noise, belt too loose? and also the top alumnimum flywheel has a crack in it. And the starting cup is starting to slide around on top of the flywheel, but if i tighten it any more it will make the crack worse!. And its a bit loose where the key slides in. Think I'm going to get a new mower, not worth all this time and expense!.