1975 Johnson 4HP 4R75, 4W75 Outboards Service Manual, Page 34Get this manual
eIf timing is not correct, rotate the timing fixture clockwise one complete turn and align the timing fixture between the timing marksAdjust points until the meter or light just indicates an open circuitSee Figure 4-20 li;; NOTE
If new breaker pOints have been installed,
adjust points to break open at the first timing mark to allow for seating of the fibre breaker block
Figure 4-18Throttle Control Cam and Follower
bDisconnect all leads from breaker point assemblies Connect meter or test light between breaker plate and forward breaker point screw terminalSee Figure 4-19
Figure 4-20Adjusting Breaker Points
fRecheck timing as described in (d) above