1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 182Get this manual
& General Safety Warnings To avoid accidental starting of engine while servicing, twist and remove all spark plug le.ads When using shop air for cleaning or drying parts: aBe sure air supply is regulated to not more than 25 PSI (172 kPa)bBe sure you use appropriate eye protection to avoid personal injury Replace any locking fastener (locknut or patch screw) if its locking feature becomes weakDefinite resistance to tightening must be felt when reusing locking fastenerIf replacement is indicated, use only authorized replacement or equivalent Under some full tilt conditions or periods where the engine's gearcase is removed, the trimtilt unit could be out of sequence, not fully supporting the engine's weightEngine might drop unexpectedly to its trimmed out positionTo avoid personal injury, always support the engine's weight with suitable hoist or the trailering arms during service Refer to Safety Section, Parts and for additional safety considerations