46 mac,
When computing the operating costs for the PT-425, it may be more reasonable to use an engine life factor of at least 3,000 hours with the current generation Robin Subaru engines. The following appeared in this Forum sometime this Summer:
</font><font color="blue" class="small">( According to the EPA regulations we are requried to stand behind 3000 operating hrs. on the engine, but that doesn't mean that the engine will fail after this time. I was discussing severe wear of parts with a customer in Alabama that had our engine on another hydraulic application tractor. With over 6400 hrs. within a year and a half, he called me demanding warranty on the wear of rings and some other parts, I've declined it, telling him that he's definately is getting his money's worth. Regards, Jack Gawecki, Robin America, Inc.,
Technical Support Dept., 800-277-6246 )</font>
Of course, after computing those costs, one would have to adjust the cost downward by applying the appropriate "PTFF" discount (that would be the PT Fun Factor discount, of course). In my case, it's up there pretty high, as I am sure it is with other PT owners, too.
Good question...