Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 105Get this manual
4Rotate plunger to line up slots Fuel Pump Reassembly
1Assemble springs, diaphragmand plunger onto pump bodyH -' b
a Slots OffsetSlots Aligned
5Compress pump assembly to free spring load on pin6Tilt assembly to allow pin to slide out
Diaphragm Diaphragm Spring Pump Body Spring Plunger
Inspection