1999 Mercruiser HI-Performance GM 377 EFI Engine Service Manual, Page 167Get this manual
Quality of the image is intentionally reduced!
377 CID6.2L ENGINES
Installation
1 Install by-pass valve and adaptor assembly to engine blockTighten bolts to torque of 15 lb-ft (20 Nm)2 Lubricate rubber seals on cylinder block adapter a