1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 351Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 351

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DIAGNOSTICS
19 psi 21 psi (131 kPa) (145 kPa)

Rich (Too Much Fuel Drop)

Lean (Too Little Fuel Drop)

90-840500 MARCH 2000

Page 5E-13