I have an Evinrude 1964 Lark IV 40 HP, 40473 – 40463 model.
There is some oily leakage from around the lower unit exhaust plate on the screw end as shown in the picture. The screw is tight. Is this just excess oil from the oil / gas mixture? It is present after running, I wipe it off and it eventually stops until after the engine is run again.
Thank you for any help or incite that you can provide-
it's more of the "gassy" oil smell. I was once told that if water got into the lower unit, then the oil would have a milky color and this is more like the gas oil mix. I'll change the lower unit oil but it don't appear to be that.
Tabbs, that pic looks like normal Johnson/evinrude to me! Keep in mind that these early motors spit out 10-20% of what they take in! Guess they wheren't worried about fuel economy back then! You may even notice an oil slick in the water when sitting idling! Matt