Ayep, the late 70's warhorse is not responding correctly, spins fine but refuses to start every time. Cleaned the carbon off the top of the rotor button, fired fine. Inside of the cap does not display carbonizing or corrusion. Viewing vapors when the air cleaner top is off, should this be flow rather than vapors when pumping the linkage? Accelator pump? Coil is cool to the touch. Electronic sweep appears normal. No vacuum leaks apparent. No missing when it does run, just stuck lifter clacking. This is her main broom and I can't afford to replace it.