Onan 2500 KVD problems
New to me 2009 Lance 845 with an Onan RV QG 2500LP generator with 40 hours total run time starts very hard and runs rough. It also appears to have an engine oil leak. When we looked at this unit the o...
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I pulled the demand regulator this morning and took it apart and everything looks like new in it. The needle valve seems to seal fine and the diaphragm is very flexible and it is not damaged in any way. I put it back together and reinstalled it and the engine runs exactly the same......way too rich.
Next, I pulled the carb/mixer off and used carb cleaner and a blow gun on any open passageways and orifices. Not really anything that comes apart, so I could not do much other then that. I also checked/adjusted the valve lash.......and it still runs the same. Turn the tank valve almost off and it smooths right out. Also tried a regulator I could take a cap off and adjust the pressure. I adjusted it down to 10"WC (static) and still the same thing.
Looking like I am just going to start throwing parts/money at it. Searching online, it looks like a new carb/mixer is going to run $450.00 or more. A demand regulator would be $150.00-200.00. I can't see where there is anything wrong with the demand regulator, but you never know and it is cheaper, so maybe start there.
I hate just throwing parts at something and hoping it fixes it......but I don't know what else to try. Maybe on Monday I can get ahold of someone from Onan/Cummins and see if there are any TSB's or known problems that would cause this.
Anyone here that could give me some guidance or know of someone I could talk to?
Thanks!
Next, I pulled the carb/mixer off and used carb cleaner and a blow gun on any open passageways and orifices. Not really anything that comes apart, so I could not do much other then that. I also checked/adjusted the valve lash.......and it still runs the same. Turn the tank valve almost off and it smooths right out. Also tried a regulator I could take a cap off and adjust the pressure. I adjusted it down to 10"WC (static) and still the same thing.
Looking like I am just going to start throwing parts/money at it. Searching online, it looks like a new carb/mixer is going to run $450.00 or more. A demand regulator would be $150.00-200.00. I can't see where there is anything wrong with the demand regulator, but you never know and it is cheaper, so maybe start there.
I hate just throwing parts at something and hoping it fixes it......but I don't know what else to try. Maybe on Monday I can get ahold of someone from Onan/Cummins and see if there are any TSB's or known problems that would cause this.
Anyone here that could give me some guidance or know of someone I could talk to?
Thanks!
