Gas/Oil ratio for old outboards

[portoffshore]

I have a 1950 Evinrude 7.5 Hp outboard (4434-12039), Its recomended (on the fuel cover of the motor) a 16/1 ratio of a high grade oil of SAE 30 or 40 body, such as Mobiloil outboard or comparable straight mineral oil. Do I really need to use such a rich mix of oil if I the current brands of outboard oil rated TC-W2 or TC-W3? This Motor has low hours and runs great( starts on the 1st pull) therefore I don't want to damage it, but it smoke's alot more than my 6 Hp Johnson (50/1 ratio) and I would like to reduce the amount of oil/smoke that I release on the lake.<br /><br /> Does this motor have sleeve or roller bearings?<br /><br /> Will changing the oil/gas ratio, change the horsepower output?<br /><br /> Thank's for the respone's I had when this was posted in the wrong category.

 

[JB]

Re: Gas/Oil ratio for old outboards

Your engine has some sleeve bearings, P.O.S.<br /><br />Using modern, TC-W3 oil and unleaded regular it should use a 24:1 mix.<br /><br />It will run cleaner, but not make any more power.<br /><br />Good luck.

 

[portoffshore]

Re: Gas/Oil ratio for old outboards

To Ancient Mariner;<br /> Thanks for your advice. Darrell