Onan 5500 marquis gold

My Onan 4.0 is in a 1983 Midas Freeport. It came with the unit. I have a little over 500 hours showing on the meter. It works almost perfectly. I say almost because lately it has been requiring me to go into the generator bay and feather the governor to start. Once started and warmed up it runs flawlessly and smoothly. I wish the problem would have manifested itself before this cold blast arrived. Now it is too damned cold to sit outside and pull the fuel filter and carb for cleaning.