Cummins are very popular in that size...….perhaps the C series. 450-480 HP.
THIS, you don't want stainless for diesel or gasoline tanks......I've seen stainless tanks only last 7 years in center consoles.
The problem is, there just aren't that many Sunseeker 115's out there and they're not owner operated. The chances of the crew of one of them...
Bomar, pretty sure. I replaced a bunch of deck hatches on a 1994 45' Viking and they were all bomar and that size......had a bomar sticker/serial...