Hi Joe -
Congratulations with your "new" toy. You will have a blast tinkering and learning all about your tractor. There is a "ton" of information right on this site, and the folks on this board offer a wealth of experience and advice while you work through the bugs.Yours is a 1941 B. Many of the A's and B's have very similar priciples, the first of which is of course the hand clutch. Just to add a bit to what G-Man said: The clutch discs are under the flat belt pulley and simply activating the clutch lever "squeezes" the discs/plates together engaging the engine crankshaft to the first reduction gear on the side of the transmission. You should hear and feel a distict mild "snap" when engaging and disengaging the clutch lever. To get to the clutch discs, just take a wide flat screwdriver, and tap gently on the edge of the cover on the edge of the pulley. Work your way around it until off. Its very likely that the inside will be dry, rusty and dusty. I take an air hose, hold my nose and blast the dust out. (If its oily, you have other problems.) I like to take out the clutch parts, clean up and reassemble.....its easy and you can do it. Just pull out the cotter pins in the three castle nuts that G-man suggested, put a little oil on the threads and back them off carefully. Then pull out the disc, and plates and wipe them off, cleaning out any accumulation of rust and dirt. Then reassemble, and just like G-Man said, tighten up EVENLY on those three nuts. With the engine NOT RUNNING work the clutch lever back and fourth, continuing to evenly tighten those three nuts untill the lever starts to click into place. I keep the clutch lever engauged untill the three bolts are snuged up. Then I work the three bolts in; checking as I work the lever back and fourth. It should be snug, and stay in place, but still reasonably easy enough to pull back and disengage. After you get it where you like it, put in the cotter pins, (probably will need new ones), and try starting it up and driving it around. You should not have to hold the clutch lever with your foot. Also, many time the pins that holds the clutch lever and the pins on the end of the rod, as well as the "eyes" get worn. Eventually you will want to address those too.
Its not normal to have your sparkplugs leak. First make sure its the plugs and not the compression relief valves you are hearing. (Might try some soapy water around each plug and roll the flywheel over to see if lots of bubbles form.) But you will want to pull the plugs and clean them anyway. That too is easy...just take off the 9/16 bolts (I think) that holds the wire loom cover on and then back out the spark plug. There is supposed to be a washer like gasket on each plug. Gap the plug to about 35 thousands or so. Check them while out placing them on the exhaust manifold or something to get a good ground and roll the flywheel over. Every time that mag. (yours is a WICO "C") snaps, you should get a sharp spark.
Good luck and welcome!
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