I have a 2004 Monaco, 350 Cummins, 7.5 Onan generator.
Over the past couple years the gen would stop running. I get code 36. Prime it and it runs most of the time without stalling again. Over the years I have changed the filters, but it still stalls, but never with any regularity. I always felt that something has to be in the tank and makes it's way to the pick up tube.
Yesterday, driving back from Florida we stopped at a rest area for a break and started the gen. Started the RV and as I was pulling out everything shut down. (No warning lights, bells or horns). After sitting and running the starter on the RV, it started and while I was able to finish the trip there were times I seemed to lack power.
Today in checking it out the RV stalled twice. Have not tried the gen. No warning lights show on the dash, no warning bells. Water in fuel light does not come on (doesn't mean it's not working) Seems to be running out of fuel. Filters were changed in the early fall. I almost wish I could stick a light in the tank to see if it's clean. Plans have us heading West in mid May and really would like to solve this before.
I have a few good suggestions from Wolfe, but would certainly welcome more help in direction.