KiwiKol, I think you are being totaly unreasonble. I would say you have failed to do regular inspections and maintanance over the 7yrs. I would also look at this from the "glass half full" side. The fact that the thing lasted 7 yrs not assembled correctly,if indeed that is the case, tells you how good it must be.
Yanmar make very good products and parts
are certainly not expensive. Especially if you compare to other manufacturers.
I have never experianced anything negative over the years with their engines. They have always performed very well for their intended use.
You are also taking their words out of context. No engine
manufacturer is going to replace a faulty component 7yrs later.
No one has said anything negative, yet you state
The feedback I am getting, here and elsewhere,
Only one person has said they have had poor service
and that is not even in NZ.
Here in NZ, Yanmar is nothing more than a sales centre. They have excellent reps. But they are not service
technicians. Yanmar have Authorised Service centres around NZ. These Technicians are trained to specialise in the Yanmar engines. If you want to deal with the service side of Yanmar, it is these centres you are dealing with. I can not speak for other countries. So your Authorised service centre should be able to make the call, get the yes or no and then make the repair.
If you think $1000 for a heatexchanger is expensive, you haven't dealt with many other makes then. Try Volvo parts
. That'll make you weep.