1980 Johnson 4HP Service Manual, Page 53Get this manual

PROCEDURE

Check spork plugsi nspect for excess Remove plugs and deposi tsugsGo to step 6ugs notGo to step 5
Check exhaust ports, nders, and pistonsRemove exhaust covers
Ports, inders, pisionsGo to step 6NotService powerheadSee pages 5-6 thru 5-14

Check engine for bindingDisconnect four wire connector and crank engine with

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives