2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 538Get this manual

2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 538

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GEAR HOUSING
aWoodruff keyGroove 4 Check the shift shaft for cracks or wearReplace if necessary
aShift shaft

Page 6A-20

90-888465 JUNE 2002