Re: Westerbeke vs Yanmar
I have limited experience with Yanmar, but have a Westerbeke 3B3. Works as advertised. Uses about 0.5g/hr @2500. Parts tend to be expensive. The only problem I have had so far was a bad selenoid.
I like the "admiral's panel" they sell.
One factor that has not been mentioned: It was my PO who replaced the old engine; access is the P323 is tight, and folks I know had to cut a vertical support (cosmetic) in the galley area to get the Yanmar engine in. Somehow the yard squeezed the Westerbeke in without cutting (or damage). May not be an issue, but in a tight fit the Westerbeke *may* be smaller??
Finally - a pro like you will have thought of this - my engine is installed backwards (V-drive), but the oil filter is off the engine, conveniently positioned on a bulkhead, and the oil sump drain tube also more conveniently located. Little things like that make a huge difference simplifying servicing.