Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 251Get this manual

Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 251

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4 With tapered end of upper roller bearing facing up (to wards crankshaft splines), slide tapered bearing over crankshaft end of drive shaftSlide bearing installation tool (91 12364) over crank shaft