davewwd Report post Posted November 27, 2012 I have an Onan Emerald 3 gen set on my 1981 Holiday Rambler. I bought it a couple months ago. I went to start onan and ended up replacing the circuit board fuel pump, and air filter. I changed the oil, filter, and spark plugs. I ran a new fuel line to tank and put a new muffler on it. I took carb off, and cleaned it. When I start it, it sounds really good, runs for about 25 minutes, and sputters for about 10 seconds and dies, with little to no load. The engine was around 280 deg.F. I noticed mice nest around engine, I cleaned alot of nests out, blew it out with air. Started again, runs for about 25 minutes, sputters and dies, still hot. Also, on dipstick, do I check oil level by screwing it in or just resting on the threads? Share this post Link to post Share on other sites
desertdeals69 Report post Posted November 27, 2012 I believe its screwed in. It sounds like some of the cooling fins are still blocked. You should have a huge amount of air blowing out the bottom. Take off all the sheet metal to make sure all the fins are clear. Share this post Link to post Share on other sites
BeauK Report post Posted January 12, 2013 Had the same problem 2 years ago with my dads unit. I replaced everything, I even replaced the carb, after $800.00 in parts I took it to the repair shop. They worked on it for 2 weeks and could not find the problem, ended up being a small hole in the intake gasket and when the generator heated up the gasket would expand and it would "suck" too much air and choke out. If I would have thought or noticed this earlier would have been less than $20.00 repair. Try it! Good Luck. Share this post Link to post Share on other sites
