Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 80Get this manual
FUEL PUMP
Fuel Pump Removal and Installation
REMOVAL
1Remove the fuel hoses from the fuel pump 2Remove the two mounting screws and remove the fuel pumpINSTALLATION
1Place O-ring seal on the back side of the fuel pump and install the pumpTighten screws
to the specified torque
2Reconnect the fuel hoses and secure fuel hoses with hose clampsFuel Pump Mounting Screws 70 lbin(8 Nm)