This morning, I removed the engine housing to get a look at the Bendix. The Bendix on my riding mower is made of metal and it had considerable rust on it but looks new otherwise. I sprayed it with WD-40 and replaced the engine housing, then started it up. It runs fine now but I guess I need to apply some lithium grease to the cog part of the bendix to prevent it from rusting up again.Starter bendix MIU14387 $27.76
Starter motor complete MIA13038 $115.87
If the mower was starting like normal before , I would change the bendix.