A filter wrench like the one in the Amazon link posted above is what I use and is the only type that works for me. It is not easy to replace the oil filter and it is messy getting the old one out.
I change the fuel filter also when I change the oil. That's probably not necessary but it's not difficult and I don't want anything to go wrong with the gen.
Wade & Debby Griffin
2018 Tiffin Allegro Open Road 32SA, Ford F53 24K Chassis
2012 Jeep Liberty