Reply To: ’57 Evinrude 7.5 fleetwin fuel mix

[frankr]

I generally refrain from getting into these fuel mix arguments, and continue to do so. However, if you look hard enough, you can prove anything you want to. For instance the ORIGINAL instructions were for 1 quart of oil to a 4 gallon tank of gas for the 5.5 and 7.5–that’s 16:1

I also have a 1960 Evinrude factory chart right in front of me with REVISED mixes of 24:1 for 3hp, 5.5hp, while 7.5 remained at 16:1.

If you really want to get in a fight I also have a 1973 factory chart right in front of me that states 24:1 for 3hp, 5.5hp and 7.5hp —AND is says you can use 50:1 in those motors ONLY if Evinrude/Johnson oil is used. Adding to the argument is the fact that E/J oil from that time is not the same oil as E/J oil of today.

Let the fight go on, and it will.