Posted by Steve@Advance on April 08, 2020 at 17:10:33 from (66.169.147.211):
In Reply to: Misfiring Massey posted by Holmanc on April 08, 2020 at 15:25:11:
That condition is almost always caused by a partially fouled plug.
If the cylinder has been run not firing, it may be really carboned and oily. As soon as the new plug fires a few times, it splashes up oil and soot, quickly fouling it.
You might benefit from a non fouler on that cylinder only. If that will get the cylinder firing, it may clean up after a while and the non fouler removed. Be sure the thermostat is in and working.
Also check the spark quality of that plug wire against the others. Check it at the plug end. Possibly there is a bad wire, points out of adjustment, worn distributor shaft bearing. Even though the ignition components are new, they are all aftermarket and the quality is just not what it used to be.
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Today's Featured Article - Tuning-Up Your Tractor: Secondary Ignition Wires and Distributor - by Curtis Von Fange. In our last episode we spent the entire day checking out the spark plugs. Is that efficency? Actually, it took more time to explain than it really did to do the inspection. At any rate we decided that a compression test was in order so we could verify the internal engine status. That way we wouldn't buy any tune up parts until we were sure that the engine was in reasonable mechanical condition. Our tests showed a fictional compression reading of 85, 80, 82 and 86 psi. That is well within a
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