Combustion Air Blower

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    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.