Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 107Get this manual
6Install O-ring, drain screws, and gasket 8Install O-ring, electrothermal valve and plateSecure with screwsd b
a O-ring Drain Screw Gasket Drain Screw
O-ring Electrothermal Valve Plate Screws
7Install filter, check valve, and gasketSecure float chamber to carburetor body with screwsb