Originally Posted by Ernieo
My RV stalled after driving for over 90 minutes.
Apparently, the mechanic thinks my fuel filter was damaged by a rock or something that broke off the water drain cock. He then said as a result it damaged the mechanical fuel filter while it was struggling to run. Is that possible?
First it's almost impossible for something to hit the fuel filter because it is right behind the battery bay which hangs about 12" past the filter.
Any thoughts? Or did the mechanical pump just go out?
I assume the bold in your post is a typo and you meant to say "fuel pump."
Your year engine has a fuel pump with a low pressure, gear driven section that feeds the high pressure section. That gear driven section uses the fuel flow for lubrication and cooling. Loss of fuel flow, or significant air in the fuel, can lead to the failing of the pump.
Now, about the fuel filter. I don't know how your filter is mounted as in my Alpine, it is inside a bay that has a floor so it is not exposed to any external elements. If you filter is in an area that is open to the road, it is possible that it can be damaged by debris. Certainly, the mechanic should show you the filter and the damage.
I'm uncertain if your engine has one or two filters, but since the mechanic mentioned the water drain, the issue must be with the water separation filter which is located close to the ground as you describe.
If you read the link I posted in another thread to you, you will find that there are other reasons for the symptoms you have which may not be a failed pump. However, if you have a damaged filter, there is a good possibility that it led to a failed gear pump.