Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 179Get this manual
1998 Model
Direct Injector Removal
1Remove harness connectors from direct injectors2Remove direct injector from cylinder head
aAir HoseRetainerAllen Screws [Torque to 60 lbin (7.0 Nm)
1998 Model
aDirect Injector (3 each cylinder head)Harness Connector
3Inspect injector teflon sealing ring (white) for signs of combustion blowby (teflon ring will be streaked brownish black)If blowby is present, replace teflon sealing ringIf blowby is not present, sealing ring may be reused4Inspect o-rings and cork gasket for cuts or abraisionsReplace components as required