Refer to either Fig. 5F-1, 5F-1A or 5F-1B corresponding to circuit breaker used.

Circuit breaker point contacts should be checked for gap and surface condition initially at 500 and 1,000 miles, and every 2,000 miles thereafter. Point contacts that have undergone considerable use, may not appear bright and smooth. However, this should not be interpreted as meaning points are worn out. Circuit breaker points that are burned or pitted should be dressed or renewed as described in "Inspection and Replacement of Parts."

SINGLE CONTACT POINT CIRCUIT BREAKER. Check the gap between the contact points with a feeler gage (wire preferred). Point gap should be exactly .020 in. when the lever fiber (2) is on the highest point of cam (1). Incorrect point gap spacing affects ignition timing. To adjust the points, looser lock screw (6) and move the eccentric adjusting screw (7) to provide correct contact point gap. Re-tighten lock screw (6) and again check the gap to be sure it remains correct.

DOUBLE CONTACT POINT CIRCUIT BREAKER. On double circuit breaker (Fig 5F-1B) adjust front cylinder contact points (5) (marked "F" on base) to .022 in. gap according to above procedure. Then adjust rear cylinder contact points (5A) to .022 in. gap in similar manner.

IMPORTANT: Check ignition timing whenever double circuit breaker points are adjusted since any change in rear contact point gap affects ignition timing.

checking and adjusting ignition timing

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