I don't know much about apu's in general,however i don't think a 1cyl engine is common 2,3 are more the norm.I would price the belts,and filters and how easy it is to get them.I have a unit with a starclass apu and the starter was 500$ i got it rebuilt for 150$ but the driver was without it for awhile and i took the starter off and on and it works i think i forgot to hook up the line for the glow plugs so i need to get a look at it or find somewere on the road for her to take it.The truckstops won't touch it which is a good thing,but point is this place is in C.A and shipping parts will cost.
