A small amount of smoke from the breather is normal. Too much indicates worn piton rings. Be shure your road draft tube is not plugged up.
You might have run the battery down from long idle periods. Generators don,t charge at idle. Charge the battery up, start it up & make shure it shows charge on the anp. gauge when you rev it up a little.
That,s good with the 7 lb. cap.