My Gulfstar 41' has a Perkins 4-108. I do have a manual for it...as
prepared by Perkins. Because shop manuals by the manufacturer are commonly
(in my limited experience) small & lacking in detail. Because nothing goes
wrong in port, with a marine mechanic anchored nearby, I am looking for
something like a, "Perkins 4-108 Repair for Dummies". Lots of detailed
description, photos and diagrams.

I trust this doesn't make me look like a dummy...;-)! Even so, this dummy
things that not being prepared will eventually make one look like a real
dummy.

I look forward to all your helpful assistance.

Glenn.