I don't know if the core of what I have been trying to say is clear, or not. But Bill did hit on a different way of saying it. Once a long time ago, there was no such thing as an anti-afterfire fuel solenoid on any brand of outdoor power. Back in those days, everybody's outdoor power engines might pop if you shut them down without a short cool down idle period. Some engines and applications did not pop as much as others, due to different configurations of the exhaust muffler or length of exhaust pipe. Then suddenly, back in the late 1980s and early 1990s, the anti-afterfire solenoids began to appear. So, the only way to solve your problem is to have a true professional, well experienced, small engine technician/mechanic evaluate your old tractor and tell you whether or not the tractor ever has an anti-afterfire solenoid on it. If you can remember a time when it did not pop when you shut it down, there may be hope that there is something faulty with an existing solenoid. But if the tractor never was equipped with the anti-afterfire solenoid valve system in the first place, then you are going to have to spend some money to have it retrofitted to behave like a modern tractor. It's kind of like if you want a 1935 Chevrolet with air conditioning on it, you are going to have to pay someone to put it on there because they did not have air conditioned cars back then.

Oh, mogzilla, you're going to come to love that sound! It's made by the jars sealing: as they cool, air seeps out until a vacuum seal is formed, at which point the pressure is less inside the jar than out so the lid inverts slightly. Some jars can seal while still in the water, as has been said; some take a little while (up to several hours), so you may hear random "pings" (as they are often called, though I agree it sounds more like "pop") for some time after you take the jars out. You can feel the lid on a properly sealed jar bending downward and so having no "give" to it (whereas before it goes in the canner, a jar lid can be bounced up and down a bit easily with a finger). Congratulations on your first canning! Aren't fresh raspberries just so amazing? You'll be delighted to be eating them in the dead of winter.... Zabby

Is this because it's an open burner? DH wants the 30" Bluestar Platinum range in our next home so I've been checking all the GW threads on Bluestar. My Dacor rangetop (natural gas) doesn't do that. And the GE propane cooktop at my vacation home doesn't do it either. These are both sealed burners.

Just wondering how you've liked your Armstrong Timbercuts flooring! They're in our final 3, and we've read bad reviews but wanted to hear from someone first hand. Thanks! @Huck Thor