Posted by Zachary Hoyt on December 29, 2012 at 09:11:04 from (173.84.189.49):
I have been trying to figure out why my 300 is so hard to start. It was fine till about a month ago and abruptly become very hard starting. Once it is running it does okay. I did some electrical investigation today and found a funny thing, unless it is normal and I was just not aware of it. The battery read 12.63 volts with everything turned off. When I turned the ignition on the voltage dropped to 12.29 in about 15 seconds. When I went around to the coil and checked the terminal where the hot wire comes in I had 11.62. When I went back to the battery it read 12.28. I shut the ignition off and came inside here to think about it. If the voltage is dropping below 12 with just the ignition on I assume it is dropping a lot more when I engage the starter. Is it supposed to be like that or could I have a faulty switch or some other problem? Should I open the dash and check the voltage on each side of the switch? The tractor has a 12V conversion with 3 wire alt, wired according to the Bob M wiring diagram. The coil is a new 12V coil bought a couple of months ago, at which time I removed the ballast resistor which had been in the line. The switch was a cheap one from NAPA and sometimes it will not shut off unless I pull it on and then off again. Any advice will be much appreciated. Zach
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