i know it is rude to offer their god a peanut.
We are happy with our Onan generator (APU). See: 5,000 Trouble-Free Generator Hours.
I kind of look at them like I do truck makes. There are good and bad in each and you just have to research and find what "fits" with you.
We are also happy with our Onan,different from yours Ateam (5.5kw) and its only problem has been that it eats water pumps.
We are on our 3rd one in 4600+ hrs.
I'd be interested to know more about your water pump issues. We have done nothing to ours but flush and fill the cooling system at the manufacturer's recommended intervals. We use the same long-life (red) coolant in the generator as in the truck engine and reefer. Not for any good reason, except it is easier to carry one jug of red stuff than one of red and one of green.
Ours came from the manufacturer with the green coolant,and then the repair facility (cummins/bridgeway in Cleveland,OH)changed it to the blue coolant the last time it was there.
All generator maintenance (oil changes, oil filter, fuel filter, air filter, belt, coolant flush and fill) is done by me in truck stop parking lots or our driveway at home. The work is easy to do and doing it myself saves money.
I also do the oil changes and the fuel and air filter changes,and find it to be a easy task.
Do you have any theories or explainations as to why your Onan is going through water pumps at that rate? Has warranty support been provided?
This unit uses a Kubota engine,so it really is a Kubota issue.Warrenty covered the first one that failed after 4 months.I paid for the second one that failed in January of this year. The 3rd one was covered by warranty because it a defective part from the beginning. BTW,cummins bridgeway in Cleveland is an excellent place to have work done on your Onan and a well stocked parts dept.
Phil, What does CARB have to say about the Onan? Is it legal in CA? I am a bit confused at to what is legal or not on my 2006.