Older Murray Rider-"Ultra"

[ILENGINE]

That appears to be a seat label applied. Maybe the seat has been changed it happens and it might not even be 42" model or even a hydro drive as hydros don't detents normally. But to OP is this model drive belt path closer to what you have?

Murray 425611x99B - Lawn Tractor (2001) Hydro Version

That model also has the foot direction control which he claims has a detent type shifter on the left fender. That is the reason that I suspect the same as you about the model number attached to the seat and the seat came from another rider.

 

[Rivets]

Thank you IL and StarTech for chiming in. I have to agree with both of you, seat has been switched. He’ll have to remove and measure the belts.