its the baterry
no, the light has nothing to do with the alternator working properly, the light is only to warn you that it isn't charging the battery properly.
Yes, because a bad coil will not allow the engine to run. But if the engine is running then the coil has nothing to do with the alternator charging the battery.
The battery light comes on when the alternator is not charging. Changing the battery did nothing. Either put a gauge on the battery to see if it is charging, or while running, disconnet the positive cable from the battery. If the car dies that means the alternator is not charging. Most parts stores will check it for free. Oriely's , Autozone, etc.
Yes, if the alternator is functioning and you are not loading the charging circuit (using as much charge as the alternator is putting out so the battery receives nothing). Please note that "Idling" to charge the alternator normally does not work as the alternator is not turning fast enough to charge the battery, it only maintains the status quo for energy usage.
A battery charges nothing it accepts a charge from the alternator.
on my old 1.2 clio the battery light came on as there was fault with the alternator and it needed replacing. As far as i know the battery light comes on when the battery is not charging or there is a fault with the battery.
Check the starter. Worn bushings can cause the starter to turn slowly. Also, if the alternator isn't functioning properly the battery will never have a full charge. You need to have the charging system tested to see if it's charging the battery. Note that batteries do not create electrical energy, they just store it. If the alternator isn't creating electrical energy the battery has nothing to store and the low charge will cause the starter to turn slowly. That should give you two places to look to solve your problem. Good luck.
Battery cables loose or corroded which is not likely with a new battery but check the ground connection and the connection at the starter. Charge the battery with a battery charger and then start the mower. Disconnect the positive battery terminal and if the engine dies the problem is with the charging system. Check all the wiring coming from the alternator located under the flywheel. If nothing is wrong then you will have to remove the flywheel and find out what is defective. Can be a diode has failed or the alternator is defective.
Yes, the battery starts the engine, and as long as the battery is fully charged the engine will start. The battery will loose it's charge if the alternator is defective and not replenishing the charge of the battery but the alternator has nothing to do with starting the engine.
No, it does nothing more to help at all.
Sounds like a bad battery or a bad alternator that isn't charging. Do you know how to use a V-O-M? Get your local garage to run a battery test and alternator check, with his Engine Analyzer.
No, the battery is part of it's circuit. In fact nothing in the car will work without the battery.