Re: H won't start (update)

Posted by Roger Mills on December 01, 2006 at 11:25:39 from (204.13.130.86):

In Reply to: H won't start (update) posted by MLD on December 01, 2006 at 05:10:09:

I have rebuilt a bunch of the old square mags for the hit and miss engines and only replaced the condenser when the points were pitted. If the condenser is good, and the correct value, the points wear evenly with no pit on either contact. The new condensers seem to vary in the value of capacitance AND do not seem to last as long. I have found that many condensers that were replaced were actually good and sometimes better than the one put in. If the engine runs erratically I replace points first and check for good spark, I usually find it. If it just quits running at all I suspect the condenser. Also over time the charge and discharge of the magnetic field will reduce the magnetic flux of the magnets themselves and that reduces the secondary voltage, therefore the spark. If this happens points and condenser will not fix the problem. Symptom is a spark that is yellow and will not jump 1/2 inch gap. Might jump a plug gap in air but won't under compression in the engine. So, if you get a spark like that with good points and condenser and it still wont run right send the mag out for overhaul.

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