1997 Johnson Evinrude "EU" 90 thru 115 90 CV Service Manual, P/N 507267, Page 31Get this manual
Preseason Service 1Check gearcase lubricationIf leakage is evident, gearcase seals may need attentionCheck lubricant level in power trimtilt reservoirSee Lubrication, this section
& 2Apply light coating ofOMC Electrical Grease to the ribbed&
portion of the spark plug ceramics and the opening of the spark plug coversConnect spark plug leadsMake sure spark plug boots are not cracked or torn
3Check water level in battery, then chargeWhile the battery is charging, 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 explodeTherefore, 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 batterysure the steering, shift, and throttle systems are attached to the engine using factory-specified hardware stored with the engine earlierFollow the manufacturer's installation instructions! If control systems are attached to the engine using the wrong fasteners or assembled carelessly, sudden unexpected loss of engine control may result5Test engine warning systemRefer to Section 76For models withif oil line has been disconnected, the oil line must be purged and the system primed before any attempt is made to start the engineRefer to Section 2, OMC Check for evidence of water in the oil tankIf water is found, review the installation and location of the oil tankDo not operate the engine if water is present in the oil tankSerious powerhead damage can occur