Chrysler 70, 75 and 85 HP Outboard Motors Service Manual OB 3438, Page 78Get this manual
EReturn indictor knob back to "100" setting and repeat test as outlined in steps through OReadings should repeat within points Compare readings with chart below Minimum Values
Spark Plug Lead Wires1Remove the number one (#1) spark plug ire from the spark plug and insert 1 4" boltapproximately 1" long into the sparkie spring Figure 132With insulated tongs, hold the bolt about 1 4" away from one of the cylinder head boltsFigure 14
Voltage 12
Test reading values shown with respective voltage are the minimum values for C-O unitsFIf C-O unit checks all right in previous stepsadjust battery voltage to volts on voltmeter by turning voltage adjustment knob counterclockwise Turn indictor knob so that mark on knob is at "100" setting GTest C-O unit as outlined in steps through ECheck values against chartIf values are at minimum or aboveC-O unit is all rightIf values fall below miminum, C-O unit is defective and mustbe replaced Test #4DistributorBefore any distributor tests are performed, turn the flywheel to top dead center (TOC) which isslip the drive belt off the distributor pulley Spinning the pulley during the following test simulates an engine being cranked over or an engine running condition