Do riding mowers hold an alternator approaching a saloon? My battery is truthfully new, a few months on a used...

My battery is truthfully new, a few months on a used riding mower. We hold to keep using a charger on it to get hold of it to start. Not every time but alot.
Answers:    Most riding mowers with mobile start will have a charging circuit, commonly consiting of a multi-pole ring with coils of flex that is mounted inside the flywheel where on earth the magnet in the flywheel will excite the coils and generate electricity.

This differs from a saloon alternator which uses a rotating coil of wire to excite the windings. The current thru the rotating coil is controlled by the regulator so that it can adjust the output of the alternator.

The typical charging coil on a small gas engine is not controllable (other than varying rpm) but an external regulator can be used to prevent overcharging the battery-operated.

If the engine does not charge the battery, the problem could be within the coil, the regulator or the wiring. Check near a small engine repair shop or look on line to see if you can get hold of service information that will show a wiring diagram and hopefully carrying out tests instructions.
Yes, they have an alternator. It puts out AC current and is changed to DC beside a diode. It puts out enough to charge the mobile for the most part. If you start and stop it alot it might not preserve up. But, the most likely problem is the battery-operated or poor connections. You can check the charging system. It should put out 3 amps.