Have johnson 6hp outboard model 56rlere trying to find year and correct fuel mix ratio?

Question

Have johnson 6hp outboard model 56rlere trying to find year and correct fuel mix ratio?

Answer 1

first 2 digits of serial no are the model year    

oil 1qt to 6 gal. gas.

Answer 2

I think Johnson and Evinrude motors are all 50:1.

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Answer 3

when in doubt, 50:1 is always safe. my smoke a little more, but won't hurt the motor.