Would you share with the group what the engine deficiencies are?
Sure. When I went to change the pre-filters, the amount of sludge present was astonishing. It was felt the entire filter system needed to be removed for a complete cleaning. In that process it was discovered that the filter bracket installation was not done with removal in mind. I had to drill access holes through a bulk head to gain access to the back side of the bolts to facilitate removal. The other option would have entailed removal of the entire plumbing system requiring coolant system draining and refilling along with a huge amount of plumbing removal and replacing. Four access holes seemed a much simpler method.
Upon removal, the starboard filter housing needed to be rebuilt. Easily done. I have two filters, a port and starboard filter that I can switch between as desired, or run through both filters.
Changing the secondary filter, a screw on type. It was discovered that it had been installed by a gorilla (see next surprise). We had to remove the entire filter bracket from the engine and use a long handled assist to get that filter removed to put a new one on... Good grief, what the heck ...
The next surprise, and a very irritating one indeed, was that the last mechanic that worked on my transmission broke the screw cap holding the dipstick. Now that one I know the name and face of the person who did that as there has only been one person that has touched that cap since I checked that oil some time back. It's amazing to me the obvious brutal nature required to have performed said act. Clearly it was not an "Oh, I didn't realize...".... Grrrrrrrr.... I know the mechanic that did both of these..."delights"....
So as I'll need to get that piece from a Yanmar dealer, the dealer here said better to get it from the mainland as here in the islands it's going to take a very long time to arrive. So I have the broken dip stick in a bag saved, and the hole has a wooden plug in it to keep the system contained and sealed.
The engine has been running flawlessly. But for reasons I can't explain, I felt upon arriving that the above systems needed a careful review. All fluids changed looked normal and well within normal use range. That's a very good thing.
dj