Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 247Get this manual

Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 247

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3 Install and seat needle bearingPull bearing up into bore until it booms on gear housing shoulderDO NOT use excessive force -
Bearing Carrier, Forward Gear and Bearing Adaptor
REASSEMBLY