20 Most Recent Swisher E4 Swindaiwa 24.5cc 4-Stroke Engine Commercial Grade Articulated Hedge Trimmer #E4-HT4000 Questions & Answers

Likely its a hydro-gear, available from multiple sources.

Swisher ZTR steering arm is a poor design and loosens over time which eventually causes control issues. If the steering arms flop about, the main pivot bolt needs tightened.

It sounds like the belt was installed wrong or not adjusted assuming it is the correct replacement.

Not likely. But to eliminate that possibility try connecting a battery charge to the battery and try engaging the blades then. Also check all electrical connection in system for corrosion and tightness. Lastly With compressed air blow all dirt and debris from the mower, especially clutch area and Hydraulic pumps. Check tension on blade drive belt.

need to know the engine make and caopacity the operators manual will have the capacity required

Check the fuel jet and make sure it is clean. If there is any dirt in it even though you cleaned the carb the unit will not run properly if any at all. I use an air compressor to clean mine ore a real fine piece of wire.