I've had mine a little longer than you and probably have the same hours on it. With little usage I've never checked the spark plug, what's going to happen to it just sitting there, it's usage that'll gunk it up. I've drained and changed the oil once. I make surre I run the generator
at least once a year for 10 minutes and I look at the oil. Of course with little usage it looks good. I don't use up or drain the gas like some might. I disagree with gas going bad or seperating. My generator
has always kicked over on no more than 6 pulls, if that. I have a gas mower that sits all winter and kicks over in the spring with gas that is at least six months old.
Now that the generator
is on the tongue of my Scamp
I'll use it more so I think I'll probably drain the oil and check the spark plug. I'm thinking once a year.