OK I have a Champion 3500/4000 Digital Generator. It worked perfectly for the first month or so but after not being used for a month (run dry for short term storage) it worked for one tank of fuel. After which I changed the oil and after that it was no-start.
Things I tried:
1) Changed the oil again, note that the oil level on these Champions should be at the bottom visible thread at the fill hole. Ignore the dipstick.
2) Cleaned the oil filter
3) New Spark Plug
4) Pulled the bowl on the carb to check for water-gas was clean and flowed well
5) Pulled the plug and checked for a spark, OK no spark so that is the problem. This take two people by the way, the plug is on the backside of the generator away from the pull cord.
Contacted Champion tech support via email, the support guy walked me thru a set of troubleshooting steps via a set of emails:
1) pull the air filter, spray some starting fluid in the cavity and the pull the cord with the choke in the run position--still no start
2) Asked if anything happened when I did this, in my case there was no reaction at all which apparently isolated the problem to the oil sensor
3) Disconnect the oil sensor, There is a yellow wire (can be black on newer models) with a quick connect on the front of the generator under the control panel. Pulled the quick connect loose. Started the generator normally.
4) Let run 15-20 minutes reconnect the wire, still runs. Problem fixed by resetting the oil sensor.
I rate the Champion tech support as A+, he was patient, knowledgeable and quick, all of these email exchanges occurred in one afternoon. I think the first response was within an hour or so of me posting on their contact form.
Even better the tech guy was able to assess my mechanical ability level and make appropriate suggestions. In general I find that most tech support operations assume that the customer is an idiot, which is probably justified most of the time. But this guy figured out that I had some mechanical ability from my post on their contact form.
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