Combustion Air BlowerΒΆ

    1. intermediate cable
    1. to glow-spark plug
    1. to thermo switch terminal C
    1. to contact breaker

  • Disconnect cables from terminal 15 and from terminal 1 of ignition coil.
  • Attach intermediate cables to ignition coil terminal and to appropriate cables disconnected from coil.
  • Connect tachometer (see illustration) and turn heater on.
  • At the working voltage of 12 Volts, speed should be between 6400 and 7100 rpm. If speed deviates considerably, remove combustion air blower and test it.