1991-2007 Mercruiser #14 Alpha Sterndrive Generation II Service Manual, Page 162Get this manual
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DRIVE SHAFT HOUSING
aNuts, Bolts, WashersNutScrew 9 Assemble the trim tab (or anodic plate) and align it to the mark made previously on the gear housingTorque the screw to 23 lb-ft (31 Nm