Gravely zt2148 ground speed???

[rerun]

My son bought a used Gravely zt2148. Unit runs good with the exception with the sticks all the way forward, it does not move that fast.

Any suggestions???

 

[djdicetn]

My son bought a used Gravely zt2148. Unit runs good with the exception with the sticks all the way forward, it does not move that fast.

Any suggestions???

Is that the actual Model Number on the plate underneath the seat? I don't get a hit on ZT2148 on the Gravely manuals search webpage.