Setting the ignition timing by means of
a battery and bulb
Insert a battery and bulb between the
engine and the moveable contact of the vertical cylinder. Rotate the
engine in the direction of the movement and set the contact so that it
opens exactly 10° before top dead
center. When the contact opens, the bulb will go off, allowing you to
check the advance and make any necessary corrections.
For the other cylinder, follow the same
procedure but rotate the engine 270°
after top dead center.
During this entire operation, remember
to set the contacts gap at 4 mm.