Home › Forum › Ask A Member › Mercury 1957 Mark 55E
Would it be alright to use 80 90 marine oil in the lower unit of this outboard ? and what is the gas oil ratio in this outboard ?
that lower takes grease. I use John Deer corn head grease. 25-1 till 50-1 came out so take your pick .I use about 40-1 with 50-1 oil. oil is cheaper than parts