User manual

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service manual which can be found on the Onan website has a troubleshooting guide
which is very helpful.
I learned recently that Onan has stopped using the oil level sensor on more recent
models due to the inability to get a reliable unit.
You can tell if the engine “fires” when holding the start button down. If it fires then the oil
level sensor is not at fault.
The generator won’t start
The fuel pickup in the gas tank is set high to keep you from running your vehicle tank
completely empty. So if the fuel level is low, the generator won’t run.
It takes a fair amount of current to run the generator starter motor, if the RV battery is
weak it may not have enough reserve capacity to run the starter. Starting the vehicle will
provide extra current via the isolator or separator.
The generator runs rough and surges
Unfortunately this is often indicative of a generator which has not been run and deposits
have built up in the carburetor. There is lot of anecdotal discussion about various fuel
additives to resolve the problem. In the end it may require replacement of the carburetor.
Where can I find more information about the generator?
At the time of this writing 12/16/2012 these documents were available on the internet.
http://www.cumminsonan.com/www/pdf/manuals/981-0153.pdf Owners Manual
http://www.cumminsonan.com/www/pdf/manuals/981-0518E.pdf Service Manual
http://www.flightsystems.com/pdf/onanrvtshootgd608.pdf Troubleshooting Guide
Be careful, there are several versions of the basic KV series of Microlite models and it’s
necessary to consult the nameplate to figure out exactly which version you have.
My generator runs on propane, do I have to exercise it?
Obviously varnish buildup will not be a problem, but the generator slip rings are copper
and they will tarnish, running the generator will keep them clean. Also moisture can build
up in the generator and running it under load will dry out the equipment. Finally you really
want to know it it’s going to work when you need it, so regular exercise is a great practice.
How long should I exercise the generator?
Onan recommends 2 hours at half the rated load every month. An electric heater makes
a nice load. Most of the small heaters are between 1000 and 1500 watts.