1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 300Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 300

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FUEL INJECTION DISASSEMBLY AND REASSEMBLY
aThrottle BodyGasketsPlate 2 Place the throttle body on the plenumInstall the lower attaching screw and two upper washers and nutsTorque to 75 lb-in(8.5