We have the diesel Onan in our 01. I just push the start button and hold it in as it will need to warm the glow plugs. After a few seconds the starter whirs and she starts up. Let it idle for a few minutes before you throw a load on it. I do not shut off any breakers before I start mine. Just make sure that it has been serviced recently, if you don't have the service records, I recomend having it done before you start it up.
2001 National Tradewinds 7370 300 Cat
2011 Jeep Wrangler Unlimited Sport
Officially fulltiming. The Journey Begins