Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 174Get this manual
AIR REGULATOR REMOVAL
1998 Model
1Remove screws securing regulator and remove regulator1997 Model
aScrewsAir Regulator
56000 56130
aDiaphragmSpringCup
1998 Model
AIR REGULATOR INSTALLATION NOTE: Apply light coat of 2-4-C wirefon to diaphragm surface to aid in the retention of diaphragm on fuel rail during reassembly