evinrude 1988 150

[Ddennis]

I have recently purchased a 1988 evinrude 150 outboard. model # e150stlcca
I don't have any manuals on this motor. The info I am looking for , what is the optimal rpm for this motor and what is the fuel mixture ratio. I am sure I will have many more questions later. Any help would be appreciated,

[boats.net]

4500-5500 rpm's at wide open throttle is the rpm range. 50:1 is the oil mix ratio if it does not have oil injection.