Normal maintenance on the hydrostatic transmission is to inspect for any fluid leaks. If it becomes necessary to add more fluid, use only genuine Honda Hydrostatic Fluid; this is the only one certified for use in a hydrostatic transmission.
Beyond that, there's a procedure in the owner's manual that shows how to adjust the shift cable (connected to the orange shift lever) so it correctly operates the speed control lever on the transmission. You can download a free copy of the owner's manual here:
Honda Power Equipment: Honda Generators, Lawn Mowers, Snowblowers, Tillers
If you are having any performance issues, there are some Service Bulletins that may address them. For example, back in 1996, a few models had problems that prevent them from being rolled backwards, or the ground speed is too slow even with the shift lever in the FAST position.
I can check if your unit is in the affected range if you will reply with the frame serial number. It's on a sticker or metal plate on the top rear of the mower deck and starts with MZBA-6xxxxxx or MZBB-6xxxxxx.
Caveat: I work for Honda, but the preceding was my opinion alone.
Beyond that, there's a procedure in the owner's manual that shows how to adjust the shift cable (connected to the orange shift lever) so it correctly operates the speed control lever on the transmission. You can download a free copy of the owner's manual here:
Honda Power Equipment: Honda Generators, Lawn Mowers, Snowblowers, Tillers
If you are having any performance issues, there are some Service Bulletins that may address them. For example, back in 1996, a few models had problems that prevent them from being rolled backwards, or the ground speed is too slow even with the shift lever in the FAST position.
I can check if your unit is in the affected range if you will reply with the frame serial number. It's on a sticker or metal plate on the top rear of the mower deck and starts with MZBA-6xxxxxx or MZBB-6xxxxxx.
Caveat: I work for Honda, but the preceding was my opinion alone.