I just purchased a boat with a Johnson 100 HP Hydro Electric Drive motor. The model # is 100ESL71A. Can anyone tell me: a) the year this motor was manufactured and, b) what gas/oil mixture I should use? Thanks much.
Howdy, Boater.<br /><br />Welcome to the board.<br /><br />Your engine is a 1971, as the 71 in the model number indicates.<br /><br />Your mix should be 50:1. 6gallons of 87 octane unleaded regular (alcohol-free) and 1 pint TCW-3 rated outboard oil.<br /><br />Good luck.
