1978 Johnson 4HP outboards Service Manual, Page 51Get this manual
INSTALLATION aInstall the power pack ground wire and position the wire so there will be no pull (stretch) when the power pack is installedExcessive pull on the ground wire could result in ignition failureSee Figure 4-40Route the ground wire through the cable clamp as shown to prevent the starter rope from rubbing on the wirebMount the power pack and tighten the screws to the torque specified in Section 2 NOTE
Carefully align the connector halves during assembly to provide proper terminal contact83027
1Power pack ground wire 2Flat washers 3Powerhead ground wire 4Star washer 5Clamp Figure 4-40Power Pack Mounting