Mercury Optimax 75, 90, 115, DFI starting year 2004 service manual., Page 228Get this manual

Mercury Optimax 75, 90, 115, DFI starting year 2004 service manual., Page 228

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DIRECT FUEL INJECTION

- Top coverExpansion plugSpring retainerVentSpringDiaphragm seat

7 Air railAir passage (from air compressor)Excess air passage (to exhaust adaptor) 10 F