James Marsh said: (quoted from post at 13:22:18 02/16/11) I installed a Pertronix on a Ferguson 35 and it worked fine until.... After a heavy snowfall, I started the tractor to let it warm before moving some snow. I let it run while I did some other chores. After one half hour or so I noticed the tractor was no longer running. I thought maybe iceing as it was single digit temps so checked everything and saw nothing wrong. Tried to restart and no-go. Too cold to further trouble shoot. After the weather moderated, I pulled the distributor cap and noticed a burned plastic odor. Inspection showed a pile of melted plastic in place of the module. Changed back to original points and condensor. Still no fire. Changed coil and started right up. Bottom line, I have no idea what caused the meltdown.
I wonder if coil, module, or battery voltage had a mismatch somewhere. The modules are definitely likely to die if this is the case--points would just wear faster. It appears that a coil failure killed the module, or vice versa, and a mismatch could have caused this.
This post was edited by TheDurk at 10:40:07 02/16/11.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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