Posted by mkirsch on January 15, 2009 at 09:46:27 from (64.80.108.56):
In Reply to: Farmall M wont start posted by Kelly001 on January 14, 2009 at 17:22:44:
OP said he replaced the coil.
If you wire the coil backwards you'll get a weak spark and the tractor won't run.
If you get a 12V coil with internal resistor by mistake on a 6V system, you'll get a weak spark and the tractor won't run.
Do the old trick your dad taught you with the lawnmower: Pull the plug, put it back on the plug wire, lay it against the engine, and crank it over. If you get a bright blue spark, it's on to the next piece of the puzzle. Weak and yellow, and you've got your problem narrowed down.
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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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