When I worked at an ATV dealer I would see ATVs come in for service that were being used as mowers. ATVs that have air cooled engines are not meant to lug around a mower at slow speeds for extended periods. In the late 80's, Yamaha made an ATV for mowing. It could be bought with a rough cut or finish rear mounted deck. The deck was PTO powered. The engine was air cooled but had a huge fan that blew air across it to keep it cool. It also had a throttle you would set for a set speed.

It seemed the first things to go bad when the engine would get real hot was the electical parts under the flywheel. The ignition pick-up coil or the charging coil.

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