Mercury Mariner Outboards 45 Jet 50 55 60 HP Models Service Manual, Page 478Get this manual

Mercury Mariner Outboards 45 Jet 50 55 60 HP Models Service Manual, Page 478

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DETERMINING FORWARD GEAR BACKLASH
Refer to "Bearing Carrier and Propeller Shaft Installation," following
4 Rotate drive shaft to 10 revolutionsThis should properly seat forward gear tapere