Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 189Get this manual

Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 189

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GEAR HOUSING
1 Remove bolts (a) with flat washers2 Remove water pump housing components and drive pin (b) from drive shaft

3 Remove water pickup tube (a)4 Remove water tube seal (b)