My boat is a 2001 Sea Ray BR190
My engine is a 5.0L EFI GM 305 V-8 1999-2001, 260 HP, model 4M31027N1, ser #OM068nnn
I've noticed an annoying clanging/rattling noise in the 1000-1300 RPM range. It goes away at faster or slower.
It is loud enough to make me wonder if something is being damaged...