(4) An accurate test light check as to when points just start to break can be made, using the instrument panel red light for the purpose. Disconnect panel light wire from the oil pressure switch, attaching this wire to the insulated terminal post on timer head. Turn ignition and light switch on. As long as circuit breaker points are closed, lamp will remain lit; as points start to open, lamp will go out. NOTE: After making use of instrument panel red light for above purpose, reconnect wire to oil pressure switch.
(5) When exact position is found, where points just start to open, flywheel mark should be in the center of the inspection hole.
(6) If flywheel mark is not in center of hole when points open, readjust ignition timing as necessary (slower or faster) by means of the timer head and band adjustment.
RA PD 318203
Figure 53—Shielded Coil to Timer Wire Correctly Connected at Coil
(7) To readjust timer head, loosen adjusting band screw and shift timer head in band. If flywheel timing mark shows forward of center in inspection hole, the timing is slow. To correct, shift timer head counterclockwise against rotation of breaker cam. If flywheel mark is to rear of center of inspection hole, timing is fast and timer head must be shifted with rotation (clockwise) of breaker cam, to correct timing.
(8) With ignition timing correct, front cylinder piston is 9/32 inch before top dead center, on compression stroke, when circuit breaker points just start to open. At this point spark occurs, igniting front cylinder fuel charge.