Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 138Get this manual
Quality of the image is intentionally reduced!
37 Ro tate crankshaft several times (using powerhead st and) to ass ure free operati on (no bind or catching )38 Th roug hly remove all oil from mating su rfaces of crankcase cover and cyli nder block