trader_4 wrote, on Fri, 12 Dec 2014 08:10:22 -0800:

I would think the oil should be changed about once a year,
but I agree an oil change isn't the issue.

The manual says 50 hours in one place and every 100 hours
in another. The generator has over 500 hours, but, I didn't
put it all on (I don't remember how much I put on).

So, my plan is to give it a "tuneup", whatever that means to
a propane generator:

1. Battery tested at Autzone for voltage under load,
2. New spark plug (Champion RC12YC I think)
3. Oil change & oil filter
https://c1.staticflickr.com/9/8583/1...9dc07783_b.jpg