Onan Generator 5500 Gold Fuel Pum
$900 for a Onan 5500 Marques Gold generator fuel pump installed in a 2007 motorhome, is this reasonable? This is at a Cummins dealer/shop, they diagnosed the problem as well.
Forum Discussion
I think those generators use 3 psi pump. As long as you stay between 3 and 5 psi, you should be fine. Not sure about the larger units.
You also MUST use a self-priming model, NOT a gravity feed. The self-priming will suck the gas from the tank and can run dry. Gravity feed pumps will quickly burn up trying to prime (not much lift to them)
I wouldn't worry much about flow rate, just match up the line size as closely as possible and you'll be fine.
Too high psi pump can overpower the carb's float and push gas into oil crankcase (not good at all).
That being said, the other thing to consider is the mount type. Make sure you can mount the pump with at least one bolt to the generator motor, at/near original position.
Very simple if you take the time to match up the specs first.
Here is a post I made recently about a replacement.
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27727613.cfm
You also MUST use a self-priming model, NOT a gravity feed. The self-priming will suck the gas from the tank and can run dry. Gravity feed pumps will quickly burn up trying to prime (not much lift to them)
I wouldn't worry much about flow rate, just match up the line size as closely as possible and you'll be fine.
Too high psi pump can overpower the carb's float and push gas into oil crankcase (not good at all).
That being said, the other thing to consider is the mount type. Make sure you can mount the pump with at least one bolt to the generator motor, at/near original position.
Very simple if you take the time to match up the specs first.
Here is a post I made recently about a replacement.
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27727613.cfm
