Posted by pete 23 on November 19, 2009 at 16:39:24 from (173.87.147.73):
In Reply to: 400 d posted by tonastoy on November 19, 2009 at 11:46:39:
IH changed their minds many times on that 12 volt with or with out ballast on the diesel models. Latest was, 6 volt coil, no ballast as they felt you ran it such a short period of time the hotter spark outweighed the high current flow through the points. And yes, the manifold switch must be operating to shut off ign when on diesel cycle. Lot of them switchs failed so they were bypassed by hooking both wires to same terminal at the manifold switch. Then of course you had to be sure to shut off ign switch or points and coil would burn up. I would venture to say we replaced more coils on the diesel models than all the gas models combined in their hay day.
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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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