I'm sure there are others, but the only recent model pleasure boat I've seen come new with Perkins
is a De Fever. I've seen them in a number of older Irwin's, and Mason (P.A.E.). I think they're an excellent, near bullet-proof engine
. I had one in my charge on a comm'l boat, a 150 Hp 6.3544T - for a Bow Thruster
. It worked like a dog & never complained. Day after day, actually driving the boat, following an ROV on pipeline inspections, etc. I have heard of problems with the mani-cooler (manifold/heat-exchanger/tank combo unit) developing internal cracks on turbo'd units. They can often be repaired at a cost of about $3500, replacement part is about $7500. That's pretty much the only big bite I've heard of, otherwise reliability
is up there with the Lehman
(forget turbo's on those, though). Parts
availability worldwide is great, and parts
are lower priced than most. Like Volvo's, they use water-jacketed turbos, and can be run at 90% power for extended periods. They're a simple design and relatively easy to work on - when they do need work.
A complaint I've heard from commercial
boat owners about their Yanmar's is that they use a timing belt which needs replacement about every 2000 hours. Definitely an indication that those engines are not designed for commercial
or severe service
I don't know about the current
business end, but always liked CAT for parts availability (like the engines, too). Pricing might be up because of it, but I don't think the supply chain will be degraded.
Perkins would be one of my first choices for my own boat.