Reply To: Gear Case Lubricant for older OMC

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January 1, 2022 at 9:03 am #252086
Don
Participant

    US Member

    There is no harm in using Hi-Vis in older mechanical shift gearcases, it makes perfect sense. But, you still must use premium blend and any electric or hydro-electric shift gearcase. OMC probably published this recommendation out of pure simplicity. 1972 was the last year hydro-electric gearcases were used in outboards, so it was easier/more clear/less confusing to just recommend using type C/premium blend in outboard 72 and older.