Generac spark plug changing

[TXredfish]

It is getting time to change the sparkplugs on my Generac generator.
The spark plugs are located on the the left and right side of the genny. I have only about inch clearance on the sides. Not enough room to place a socket of any type. I may have to pull out the genny to change which appears to be a major job. It does not slide out. Any suggestions? If I have to take out the genny any ideas? I hate to take it to a dealer just for this which should be a simple operation. At $115 per hour, that could be a $250 job at the dealer.
Do most dealers have a generator maintenance deal? Thanks ..............