I had a 38' sport fisher with a pair of Cummins 210s and 2 single engine boats, both with Cummins. I've also had a 54' sport fisher with a pair of 8V92 DDECS. (760hp each) My current boat is a single & has a Cummins 330B. Now, I don't want to throw mud on anyone else's engines but I've had Cats (2 pairs of 3208s) a pair of Perkins 200s and 3 Cummins
& I love the Cummins. Easy to change the belts, you can move the dip stick and oil fill if it's not in a place that suits you, etc. I've never had a problem or engine failure with the Cummins.
They would be great re-mans for a lot of boats.