Contact Breaker Point Gap and ignition Timing Adjustment

Adjustment of the point gap and ignition timing should be made for both R/H and L/H cylinder at one time. To adjust, proceed as follows:

Contact Breaker Point Gap:

Turn the generator rotor counterclockwise and check the point gap when it is maximum. The correct gap is 0.012-0.016 in. (0.3-0.4 mm) for the L/H and R/H points. Then loosen the contact breaker plate locking screws (5) when the point cam (1) is at maximum lift and move the contact breaker point plate (4). Tighten the locking screws when the correct gap is obtained. Adjust both L/H and R/H points in the same manner. Recheck the gap after tightening the locking screws.

NOTE: Wipe the contact breaker point surfaces with clean rag if dirty.

 

Ignition Timing: Adjust the ignition timing upon completing the adjustment of the contact breaker point gap. L/H side

  1. Turn the generator rotor (6) counterclockwise and align "LF" mark (8) (on L/H cylinder) to timing mark (7). The ignition timing is correct. if the L/H contact breaker point (2) starts opening. To check the ignition timing, connect a 12V-3W bulb as shown in the figure and observe the moment the bulb comes on (see figure below)
  2. If the ignition timing is incorrect (either advanced or retarded), align "LF" mark to the timing mark, loosen base plate locking screws (10) and slowly turn base plate (11) until the bulb comes on.

       

     

    NOTE: The ignition timing will be advanced if the base plate is turned clockwise; it will be retarded if the base plate is turned counterclockwise.

    Tighten the base plate locking screws upon completion of the adjustment. Turn the generator rotor again and check if the contact breaker point gap of 0.012-0.016 in. (0.3-0.4 mm) is maintained for the L/H breaker point.

    R/H side

  3. Then connect the bulb to the R/H contact breaker point. Turn the generator rotor counterclockwise 180 degrees (1/2 turn) and align "F" mark (9) with timing mark (7). If the bulb comes on when the marks are aligned, the ignition timing is correct. If the ignition timing is incorrect, loosen contact breaker base plate locking screws (12) and vary the R/H point gap within the range of correct gap to adjust the ignition timing.
  4. When the correct ignition timing is not obtained even if the R/H point gap is varied within the range of correct gap, a readjustment is required in conjunction with the ignition timing of the L/H cylinder.

When this is the case, proceed as follows:

  1. Move the R/H contact breaker plate in the direction of adjusting the ignition timing within the range where the R/H point gap of 0.0120.016 in. (0.3-0.4 mm) is maintained, and tighten the plate lock screws. (reduce the point gap if the ignition timing is advanced and increase the gap if it is retarded.) Then loosen the base plate locking screws and turn the base plate until the correct ignition timing is obtained for the R/H cylinder.
  2. Move the L/H contact breaker plate in the direction of adjusting the ignition timing within the range where the L/H correct point gap is maintained.

 

Repeat the operation outlines in pars. 1) and 2) until the correct ignition timing is obtained for both L/H and R/H cylinders. If the correct ignition timing is not obtained for either L/H or R/H cylinder within the point gap range of correct gap, replace the contact breaker point assembly with a new one and make a readjustment.

NOTE:

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