Small Engine Troubleshooting Problems? Ask a Mechanic Now.
What is the model number of the genset?
The first thing you need to do is to have the fuel system tested.
Unless you have had gaseous fuel training and have the proper equipment, this is not something you can do yourself.
A problem like this is most often found in the demand regulator.
No, the LP is the most likely cause of the engine running hard and shutting down.
For the oil, you may just have not had all the old oil drained out, especially if it was parked on a slope.
Also, some of that oil needed to get into the filter.
Yes, that unit should hold 4 quarts of oil.
Without being able to see the unit, it is impossible to say why it will not hold the 4 quarts.
Did you put in 3 quarts, and then start it to fill the filter and oil system? Or did you just try to dump the whole 4 quarts in right away?
I find it hard to believe that there would be that much sludge in the crankcase, and the engine would still run.