Harry - I kinda doubt the problem is electrical. 12 volts at the high side of the resistor, about half that at the low side of the resistor and battery side of the coil, and 0 volts at the other coil primary terminal is normal with the engine stopped the breaker points closed. (If the points are open you should see 12 volts at all 3 places.)
Rather it sounds like you're dealing with a carburetor problem. Here's what I'd do:
1 - Make sure the breaker points (under the rectangular "tin can" on the side of the block) are clean and are properly gapped (0.020")
2 - Thoroughly clean the spark plug. Or better yet replace it with a new one. Before replacing the plug, connect it to the coil wire then crank the engine. You should see a fat, blue spark at the plug gap.
3 - Drop the bowl on the carburetor and clean it out. Check that the float moves freely and that the float needle shuts off fuel flow when the float is held up with LIGHT finger pressure.
4 - Replace the carb bowl. Now turn both the idle and power mixture adjusting needles in to their seats (gently!) then open each up 1 full turn.
That should get the engine running again. Then after the engine warms adjust the idle mixture screw for the smoothest slow idle, then the high speed screw for the best running/power at full speed.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
... [Read Article]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
