That is my concern, so I am biting the bullet and getting a new one from Westerbeke as they will stand behind it. The Z-400 is what I see as well, but I do not have a Kubota dealer nearby and do not want to hold up the yard's dock longer than needed, nor do I want to give them a tractor part that might have some silly little difference that stops the mechanic in his tracks. All of the input here has been terrific, however. I am still curious as to chicken or egg as cause, but will be sure there is good alignment when all is done. My sense is the odds say the belt broke first, being 25 years old, but we will never know I guess. Turns out my engine panel is a standard model with no low oil/overheat alarm built in. Been sailing now for 50 years and this is my first tow, so I cannot complain.