Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 295Get this manual
Pump Replacement NOTE: The pump is not rebuildableIf pump is defective, replace as an assembly
4Remove O-ri ngs 11 32" .0(O.86cm D.o from base of old pump and install Ihem on new pump 5Lubricate lip of adaptor seal with lightweight oil
1Remove oil reservoir from pump adaptorIf oil is clean, retain it in clean container
6Inslall pump and torque fastening screws to 75 lbin(8.5 Nm)
2Remove Torx screws using special Torx socket or 3 16" socket(You may have to tap the 316" socket down onto the screw head) 3Lift pump from adaptor