Posted by Roger46 on August 01, 2010 at 10:35:04 from (75.221.226.167):
Last week I posted a message about my Cub that wouldn't start after being at the Wisc Farm Tech Days. It had spark, gas, and compression, but would not fire. I finally discovered that it didn't have sufficient spark. It turns out that the magneto got wet inside the coil area as well as the top cap. The only way I was able to completely dry it out was to heat up the magneto with a heat gun and put the top cap in the oven (wife not real happy about) for about an hour. It is an old top cap and must be bakelite as it seems to have absorbed water; because I first dried it with the heat gun, but it became wet inside again after sitting overnight. Also, I discovered that the tang inside that contacts the coil was broken and not making good contact with the coil. Fixing that and drying it out, the Cub fires right up. I was surprised that it wouldn't run with the spark it had, but must not have been enough. I did what someone had suggested and opened the gap on a sparkplug to about 1/8 inch and it wouldn't fire, but my Farmall B magneto would easily fire across that gap. Thanks for the suggestions. Roger
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Today's Featured Article - The Day Tractor Lovers Dream About - by Angus Crawford. The day started at five o'clock on the morning of Friday, the January 29, 1999. My father, my sister, my uncle, my cousin and myself all climbed into my uncle's Toyota van. It was six thirty in the morning and we had a long day ahead. We traveled for six and a half hours to our destination - a little country town with a population of no more then one hundred and fifty people (57 of them being children under the age of thirteen). We arrived hoping to meet up with a man we knew had over one
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