I have a 49 8n, 6V. I have never had any trouble starting it until a few days ago. I had just driven it a few days before. It had seamed kind of sluggish on the start. I was thinking battery. I have not replaced the battery and I have had it for about 6 years. The starter ran down to a stop I pulled the battery ant took it to the garage. The tractor sets in a tent shed, that is just about as far as I want to carry a battery. Hooked it up and it looked good. let it charge a bit, then put it back in. Cleaned and shined every thing in the prosses. It still would not turn over. I brought the truck down and jumped the starter with 12V nothing. Something is wrong. If I turn the motor with the belt I get a tight spot, then it will roil slowly to the next tight spot. Took plugs out, they are dry. It turns over a little better with all the plugs out, but not near what it should with the 12V. No water pumping out of the plug holes. Thanks for you help and thoughts.