1965 Evinrude 90 HP StarFlite Service Manual, PN 4206, Page 37Get 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 regapping, adjust only the ground (side) electrode as attempting to bend the center electrode will c;ack the insulatorSee Figure 4-15DO NOT sand blast spark plugsPoor motor performance and premature spark plug failure may result from improper spark plug installationBefore installing the plug, be sure the plug seat in the cylinder head is clean and free from obstructionsSee Figure 4-16Install new spark plug gasket, screw the plug in by hand, then tighten to the specified 20 to 20-12 foot-pounds
cTo remove any traces of dirt from contacts insert piece of bias tape and work it up and dowr: between the pointsRepeat entire cleaning procedure for second set of pointsd points for good electrical contact, using IgmtlOn analyzer as described under "Breaker Point Testing Check and adjust breaker point setting as necessary as described under "Breaker Point Adjustment"RESISTOR WIRE (IGNITION COIL LEAD) ohm resistor wire is used in the ignition coil primary circuit to limit" current through the coil at idling speedsSince the resistance of this wire is determined by its length, DO NOT shorten or splice this wireReplace the entire lead if repairs are necessaryCheck the resistance of the lead with an ohmmeterSee Section 7, Figure 7-1, Wiring Diagram, for terminals on this lead (white with red stripe), located on ignition coil and in motor cable connector