Onan marquis 7000 shutting off after like 15 min/overheat
I know it's overheating, but this is air cooled a d don't see any blockage in the grate. Is this likely a thermostat?
Forum Discussion
Chrisbouch wrote:
Not getting a code. Maybe it's not overheating you're right. I guess it could be a fuel pump or the exhaust leak. Exhaust leak sounds right honestly as it's hotter than heck and the hot air seems to be blowing as much out of unit as it does out the exhaust and works when cold weather
Do you have a light on the start switch that's on the Genny? That is where you would read the code. The manuals have numerous codes in the back for troubleshooting. It also tells you how to read your code. Mine was a 36, which means the engine shut off with no communications electrically, IOW it had to be a fuel issue. I've learned that the fuel pumps for these gas Onans are good for about 750 hours, then the diaphram gets weak and will not keep the pressure up once it gets hot. It is true for the 4,000, 5,500, and 7,000 gas units. Many You-Tube videos on this issue.
Al
