1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 361Get this manual

1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 361

Quality of the image is intentionally reduced!

DIAGNOSTICS
aIgnition OFFbBlock fuel return line using fuel shut-off valve toolcIgnition ON
Step 8 Step 11 Step 12
Does fuel pressure hold?
910111213
Check for restricted