1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 52Get this manual

1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 52

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ENGINE LUBRICATION IL SELECTION Crank ase oil hould selec ed to gi ve the bes performan ce und er the clima ti nd opera tin conditio n- pre'al nt in the area in whi ch th ngin is op rated An oilwhlch