Reply To: 1958 Mercury mark 10

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March 20, 2023 at 5:10 pm #274207
mark weaver
Participant

    Does anyone know if 80-90 gear oil is ok in this old motor. It looked a lot more like gear grease in it when I changed the impeller. After getting a look at the transmission in this thing I would think a heavy oil would reach more than grease.