[keithandpenne]

You did not say what size the gen is. You might want to check the total load as you may be right on the edge of its max load capability, causing it to "stumble".

The plus side of a propane unit is that the fuel never "goes bad" like it can on a gas unit. They can become hard to start in cold weather and many of the larger units have the capability to be started on gas and switch over to propane once running.