1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 303Get this manual

1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 303

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Gear Housing Pressure Test 1R emove vent plug and install pressure test gaugeTighten securely
2R emove "F illplug and gasket3 Insert lubricant tube in "F illhole, then remove "Vent "
plug