"I use this for power at the racetrack. Right off of the bat, the fuel bowl (on the fuel filter) cracked in 20 places and leaked fuel all over the place. So, I replaced it with my own diesel filter. Then the wheels started to fall apart so I mounted the whole thing on a set of heavy duty casters (which came from Northern Tool) , which made it 1000X easier to move around. Then at 20hrs, it started smoking and backfiring. Within 5 minutes is shut down and would not start. We spent a few weeks trying to figure out why it wouldn't start. I checked everything. I took the injection pump, injector and valve cover off. I did notice that the air filter was completely plugged up with gunk and that when it would crank, exhaust would come out the intake. I took the fan shroud off and used the timing marks to check the cam timing (I found an engine manual online from Kipor, who is the company that actually makes the whole thing). Everything was fine. It had compression, the injection pump was pumping fuel through the injector and cam timing war right on.
At this point, I decided that I was going to take the engine apart. I thought that maybe it had a broken ring, a chinese gnome hiding in the crankcase or who knows. Anyway, while I was taking the exhaust off, I found the problem. this generator has a catalytic converter on it. The cat broke up and plugged the exhaust off 100%. So, I took out the rest of the internals of the cat and stuck it back together. It fired right up and ran like a champ. I never thought that this generator would have been equipped with a cat.
In conclusion, if you are a mechanic with about 30 years of experience and are surrounded by a bunch of other mechanics (at a racetrack), you can keep this generator going. While I had it apart, I fixed about 20 other things that were going to be failing within a month or two. I do suggest replacing all of the fuel hose (make sure it's diesel compatible) because within 18 months it was so dry rotted that it was a matter of time it was going to fail.
I just wonder what's going to go out next. I bet that it'll stop generating power but run really good. I should have known better as to buying a generator like this but I can only blame myself. On the other hand, I've learned a pretty good amount on this thing and should start my own service center as these things look like a gold mine.
One other thing, there is a compression release inside (right over the exhaust valve). So if you have the whole fuel system off, you can get it to prime much quicker by letting it freewheel until you get fuel to the injector."
What is your level of technical expertise? Professional