[HANGAR]

I had the same issue with my 5500 Onan. It would be difficult to start, but once it did start, it only ran for a few minutes and would then die. Did some trouble-shooting and found the original Onan fuel pump worked, but the flow seemed weak. Replaced it with a universal automotive fuel pump made by Purolator and it now works like a champ. Relocated the pump to an area where it's a lot easier to get to than the factory location. Also replaced the primary fuel filter (near the fuel pump) with a "clear" filter so I can see the gas going through the filter and check the cleanliness of the filter. Saved a ton of money not replacing these items with the OEM Onan parts and the new mounting location now allows me to easily see the gas flowing through the filter.