Posted by Janicholson on May 20, 2016 at 18:51:40 from (63.152.246.124):
In Reply to: long arc sparkplugs posted by Petehall on May 20, 2016 at 18:13:36:
A plug can have carbon fouling that will create an electrically conductive path from the center electrode down the outside of the insulator and to the shell. This fouling prevents sparking across the electrode gap to the ground and thus fails to ignite the fuel. The extreme gap caused by the pulling of the wire, causes the coil vltage to go way up (maybe 25 to 30K volts) this increased voltage flashes across the spark gap due to its intensity. Thus the cylinder fires. Jim
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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