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I've got a Hustler Fastrack with two tanks and the selector switch has always been somewhat difficult to turn. This morning, I had to get pliers to rotate it 180 deg. Any recommendations on getting it freed up? I don't know if spray lube in the top is sufficient, or if it needs to be taken apart. thanks.

Liquid Wrench penetrating or lubricating oil, 3 in one oil, etc. just give it a try several times while moving lever back & forth until it loosens up.

I tried that once before, and it helped, but it's worn off and is now worse than ever. I hit it again yesterday with PB Blaster, and it helped, but not much. I just ordered a replacement.