Onan 4.0BFA-1R 16004C Fuel Pump Orientation
I recently bought an old (1984) honey of an RV. Most of my time has been spent straightening out the wiring as someone who didn't know much about electricity thought possessing a screwdriver and a monkeywrench qualified him.
This has an old venerable Onan 4.0BFA-1R 16004C GenSet. It will start and run but often quits after some minutes. It surges and drops back at times, almost to quitting before surging again. I am suspecting fuel starvation, perhaps a bad fuel pump.
I have the original parts manual for it and the blow-up for the fuel pump shows a twist-on cover with the filter being inserted under it. This cover is shown as the top in the drawing however it is installed on the bottom on my genset. Which makes me wonder whether or not someone installed it upside down.
That doesn't make sense to me as I would think it wouldn't run at all as the pumping direction would be the opposite of what it should be though it makes since that you'd drop the filter in and twist on the cap.
This has an old venerable Onan 4.0BFA-1R 16004C GenSet. It will start and run but often quits after some minutes. It surges and drops back at times, almost to quitting before surging again. I am suspecting fuel starvation, perhaps a bad fuel pump.
I have the original parts manual for it and the blow-up for the fuel pump shows a twist-on cover with the filter being inserted under it. This cover is shown as the top in the drawing however it is installed on the bottom on my genset. Which makes me wonder whether or not someone installed it upside down.
That doesn't make sense to me as I would think it wouldn't run at all as the pumping direction would be the opposite of what it should be though it makes since that you'd drop the filter in and twist on the cap.
