Reply To: Firestone 5hp oils

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June 27, 2020 at 11:59 am #206844
frankr
Participant

    What year Firestone? Fuel mix is 16:1 TC-W3 oil,, regular gas. Lower unit gets grease (Lubriplate 105) through 1955, 80-90 Outboard gear lube 1956-up.