Any small hole attracts mud daubers, I had them fill both ends of a roll of 1/4" copper tubing one time. They are also why I keep my torch tips that aren't being used in Ziplocks. But they are not necessary to plug the exhaust on string trimmers, chainsaws, etc. Most of these come with "spark arrestors", fine screens that the Forest Service requires. I just rip 'em out. Older 2-strokers will often build up carbon deposits right in the exhaust port, to the point there's only a pinhole between the piston and the muffler. A little experience and you can tell by the sound what the problem is.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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