1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Manual, P/N 507870, Page 40Get this manual
Presea so Service 1Check gearcase lubrication If leakage is evident, gearcase seals may need attention Check lubricant level in power trimtilt reservoirSee Lubrication, this sectionribbed portion of the spark plug ceramics and the opening of the spark plug covers Connect spark plug leadsMake sure spark plug boots are not cracked or tornbattery is charged, the acid solution inside the battery gives off hydrogen gas which can explode if ignited by spark or open flameIf hydrogen gas is not able to leave the battery (vents are clogged), the battery itself may explode Therefore, when charging batteries, make sure that battery is vented to atmosphere and lots of fresh air is in the areaMake sure no sparks or flames are presentDo not short across battery terminals to check battery conditionInstall and connect battery