Mercury Optimax 75, 90, 115, DFI starting year 2004 service manual., Page 269Get this manual

Mercury Optimax 75, 90, 115, DFI starting year 2004 service manual., Page 269

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EMISSIONS
Manufacturer 's Responsibility:
Beginning with 1998 model year engines, manufacturers of all marine propulsion engines must determine the exhaust emission levels for each engine