Thread: Lost a Cylinder
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Old 10-05-2017, 06:35 AM   #10
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Join Date: Jan 2007
Location: Reading Mass/Newburyport/merrimack river
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Originally Posted by piemma View Post
Yeah, your right Jim. I think Joe is on target with the coil. Mechanic took a quick look and the upside was all 4 cylinders have 150# compression which is factory spec. Downside is 2 of the 4 plugs were wet which means they weren't firing. New wires, plugs and next steps tomorrow.
What happens with the CDI units is one bad coil will take the other one out because they share a bias from the trigger.. sometimes you can ohm test them but unlike old conventional coils that will show defective windings they seem OK...sometimes a defect in the potting material does not show on standard test and a shorted diode or open diode doesn't read as bad making them a little harder to diagnose.. as long as compression is good every thing is a relative simple ( albeit expensive at times) fix...

Last edited by Rockfish9; 10-05-2017 at 06:38 AM.. Reason: not enough coffe in my veins

A good run is better than a bad stand!
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