1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Repair Manual, P/N 520206, Page 220Get this manual
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32 Fill the gearcase with 16.4 floz(485 ml) lubricant as follows: The gearcase must be in an upright position Remove the oil level and the oil filldrain plugsReplace the seals if damaged Fill the gear