gas generator onan 5000? anyway it starts and runs for about 45 minutes then it stops. If i wait till it cool down it goes againg runs awile then stops. any ideas.
First CHECK the oil. If it does not dribble out the fill hole, add until it does. If it is in any condition at all, it will pump a lot of oil into the engine, and it will shut-down on low oil level. If this does not fix it, follow Michael's recommendations for testing.