Have a Craftsman gas push mower that I just bought at the beginning of
this summer. Suddenly the last two times I have used it it sounds like
it's going to stall although it never does. It hums along fine for a
few seconds then sounds like it's about to stall then it picks up and
hums along again for a few seconds, almost like clockwork. When I
push down on the handle to lift the front wheels off the grass, the
engine runs fine. Any ideas?