Great suggestions, Leo. Thanks. That's an interestin' thought about the gas cap. I'll see if it's vented. I agree with you--it's a gas problem, I'm pretty sure.
I got the plugs cause the old ones were crapped out with carbon and needed changin', anyway. And I figured that even though the problem ain't the spark, anything I could to do get it to fire better would help. Plus, I want to do the easy stuff before I get into carb surgery.
Earlier, I coulda sworn I saw gas shooting outta one of the jets, but this afternoon it was looking kinda dry in the barrel and I didn't see anything spraying when I opened the throttle. I'll take another look tomorrow. Could be the jets're clogged from sittin' so long. Also, the way the gas feeds from the tank (the petcock is in a bad place), I might need to put another gallon or 2 in.
Since yer such an optimistic, sunny-side-a-life guy, Leo
I should mention that there ain't no gas leakin' from the tank. That's a downright blessing!