Got an '89 Mariner OB 40 hp. Changing out the lower unit gear oil. While draining out old oil and had a blue color. Any idea what brand or made by? Is this reg/convent oil or Synthetic? I would like to use the same stuff.
Just picked up a used boat. Has an Evinrude 70 HP OB motor and I'm in search of two info's needed for now to start with. Any one know What is the fuel mix ratio and the mfr year of motor. Ser # J0003147 Model # 70573-B.