Changing the oil on my Westinghouse Dual Fuel 9500 generator and Dual Fuel 4500 Inverter generator ahead of a weekend storm. Fortunately, power was not lost during the storm but it's always best to be prepared!
I use a used 5quart oil jug I cut out a large square on the side of. Cap to allow draining. Slides under nicely. Also permanently tie wrapped a plastic piece to the frame that allows draining oil to channel exactly where you want it to go
I noticed that there isn't a gasket on your drain plug. Nor on mine. Same generator. The user manual lists a gasket. Plus there isn't a torque value printed for the drain plug. Just tighten. As a former auto mechanic I like having a torque value to work with. Well it has never leaked.
Might think about spending another 15 minutes on what you did when storing. Drain carb bowl. Remove all fuel from tank by siphoning bulk out. Remove small fuel line near fuel valve to drain remaining fuel. You can even use your air hose on low to blow out any remaining fuel from carb with drain bolt removed). Then store it. No fuel anywhere. I stored mine for as long as 8 months or more that way and it starts always on first pull. No Stabil ever. 15 yr old generator.
I believe that the stabilizer claims to keep fuel good for up to 1 year. I use mine enough throughout the year that it only ever stays in there for 4-5 months.
If available, buy ethanol free gasoline. Also, you should treat your gas in your can and not in your generator. Too much Stabil will erode gaskets and seals. If you use ethanol free and don't store for more than three months you don't need stabilizer.
I use gasoline without ethanol in all of my power equipment. It's pricey but worth it. Especially for 2cycle. Plus I add Stabilizer for storage. And run it at least once a month.
Yes, I agree with you. The manual says to change the oil every 50 hours of run time or every 6 months. That sounds like a long time to some but if you're running it constantly during a power outage, you could easily have to change the oil after just a couple of days of use.
I've got a 50 Amp transfer switch that I connect the larger generator too. It will run everything that I need (well pump, 2 refrigerators, 2 chest freezers, tvs, lights, fans, etc.
The most common and economical method is to back feed into your main panel with a 50amp breaker and an interlock. There are plenty of RU-vid videos showing how to, or hire an electrician.