Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 179Get this manual
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GEAR HOUSING
8 Mandrel (91-84536M)
Quicksilver Lubricants and Service Aids
Part No92-13872A1 92-19007 A24 92-34227-1 92-825407 12
Description Special Lubricant 10