1988 Johnson Evinrude CC 60 thru 75 outboards Service Manual, Page 250Get this manual
Install vacuum testerPump out to 3-6 in(76-127 mm) of mercury and see if vacuum holdsThen pump out to 15 in (381 mm) of mercury and checkIf the gearcase fails to hold on either test, put lubricant around suspected sealIf leak then stops or lubricant is drawn in, that seal is defectiveWhen the gearcase checks properly, fill it with the proper lubricant29Fill the gearcase with 20-22 floz(600-650 ml) of lubricant as follows: Secure gearcase in an upright position Remove the oil level and the oil filldrain plugsReplace the seals if damaged Fill the gearcase with OMC Hi-Vis gearcase lube until lubricant appears at the oil level holeInsert the oil level plug firstInstall the filldrain plugTighten the oil level and the filldrain plugs to torque of 60-84 in Ibs(79 Nm) Inspect the gearcase oil level after the motor test has been performed16s1 30To adjust' the shift rod height, check from the shift rod hole to surface of the gearcase using OMC Universal Shift Rod Height Gauge PIN 389997, with the shift rod in the NEUTRAL position tZQj