1965 Evinrude SportFour Heavy Duty 60 HP Outboards Service Manual, 4204, Page 32Get this manual
CLEANING, INSPECTION, AND REPAIR SPARK PLUGS Inspect plugs for cracked porcelain and excessively worn electrodesClean the electrodes with point file and adjust to the specified gap, .030 inchIn re-gapping, adjust only the ground side electrode, as attempting to bend the center electrode will crack the insulatorSee Figure 4-11DO NOT sandblast spark plugs
CLEANING BREAKER POINTS aAfter extensive service, the breaker pOints may become worn, dirty, or out of adjustmentInspect the breaker assemblies for corrosion or other wearQuestionable breaker pOints should be replacedCheck action of the spring and free movement of the breaker armDO NOT change breaker arm spring tensionbDirt, foreign particles, and oil are very detrimental to contact performanceThe oils and acids from person's hand, even though clean, can affect contact resistanceOil deposits on the points will cause them to burn out after very short period of operationNever file pOintsreplace themcTo remove any traces of dirt from contacts, lightly saturate piece of bias tape in alcohol or trichlorethylene, insert between the points and work it up and downRepeat entire cleaning procedure for second set of pointsdCheck points for good electrical contact, using ignition analyzer as described under "Breaker Point Testing"Check and adjust breaker point setting as necessary as described under "Breaker Point Adjustment"