There are a few possibilities. You should have a basic tester to help determine where to start. You would want to confirm first that there is no draw on the system and that terminals are clean and secure. These have both a stator under the flywheel which you can test for AC output out of the harness. There is also a voltage regulator which converts the AC to DC the battery can use. There are Kawasaki manuals on line and I think I have the JD manual for this as well. If you are looking for easy, buy a Battery Tender JR for about $25. That is if you have an electrical outlet near the tractor and leave it plugged in until you are ready to use it. That would at least extend the life of your battery. The PTO is taking current constantly when in use, but it will take a while to drain the battery down.

Hello, folks. I hate to revive this dead horse, but I'm having the same problem described in this thread -- again. The starter on my John Deere RX-75 is refusing to turn over again, unless I happen to catch it in the right mood. It fires off fine when I walk by and flip the key in the garage. But sometimes it doesn't after I've turned off the motor -- usually with half of the yard still to cut. I've fiddled with the shift lever to make sure it's in neutral, and I've checked all the wiring that I can see. Any other ideas? When this happened last year, I tried some of the tricks mentioned here. I thought one of them must have worked, because the mower straightened up and cranked right. Last summer I took the mower to a John Deere dealer after this happened. It cranked like a new mower in the shop, of course, so I figured (hoped) they had cleared up whatever the problem was. No such luck.

Nope. just getting my info from an ONAN manual. This is a bit garbled since I'm copying it from a 2 column pdf file- 3. Pull spark plug wires off spark plugs and remove spark plugs. Connect an approved spark tester to each of the spark plug wiresand ground them away from spark plug hole. Turn key on and crank engine over for 5 seconds while watching for spark. If a spark occurs regularly, the problem is not in the ignition system. If no spark occurs, go to step 4. Incorrect wiring can cause elec- tronic ignition damage. Do not attach any lead or jumper with power (such as B+) to coil negative terminal. 4. Connect a jumper lead directly from the positive battery terminal to the positive (+) coil terminal (smaller diameter of the two threaded posts). Crank engine over while watching for spark. If spark occurs, the problem is in the low oil pressure cut out switch (if equipped) or related wiring, the lubricating system (low oil pressure), or in the other circuitry bringing voltage to the coil. If no spark occurs, go to step 5. 5. Connect positive side of voltmeter to negative (-) coil terminal (larger diameter of the two threaded posts) and negative side of voltmeter to engine ground. Turn key on and rotate flywheel slowly by hand while observing voltmeter. Voltage should switch between battery voltage and 1-1.5 for each revolution. If voltage does not switch properly, replace ignition module. 6. Install spark plugs and wires. If ignition module is being replaced, be sure to connect red lead from new ignition module to positive (+)terminal of coil, black lead from module to negative (-) terminal of coil. Continuity Test 1. Pull spark plug wires off spark plugs and remove spark plugs. 1-1 Accidentalstarting of the engine AWARNING can result in severe personal injury or death. Remove spark plugs before proceeding. 2. Turn ignition on. 3. Connect a voltmeter between the negative (-) coil terminal (larger diameter of the two threaded posts) and a good engine ground. 4. Rotate the flywheel slowly by hand in the clockwise direction until the voltmeter reading switches from approximately 1 volt to battery voltage. Atthis point, one of the chaff screen screws should lie between the two timing marks on the blower housing. To recheck timing, the flywheel must be rotated another complete revolution in the clockwise direction. Moving the flywheel back and forth across the reference timing mark will not activate the electronic ignition control. This post was edited by bill_kapaun on Mon, Feb 17, 14 at 20:17

***"I have a John Deer L120 and the engine will not crank when using the key ignition.***" Tell us more please. Engine brand, engine model number and type number are needed. Also, please describe your method of "testing" the safety switches. Also, could you do all this in a fresh new thread of your own creation? Members presenting a new problem, should make a new thread to cover that. It just makes for a better process than trying to piggyback onto an old thread. Thank you.