The 1986 Yazoo Model S22 is a commercial-grade zero-turn riding mower featuring a 22 HP engine, 52-inch cutting deck, hydrostatic transmission, heavy-duty steel construction, and commercial-grade components. This parts manual provides comprehensive information for maintenance, repair, and replacement of all components. Below are key sections covering specifications, engine components, cutting system, transmission, electrical system, and troubleshooting.
Key specifications: 22 HP commercial engine, 52-inch fabricated steel deck, dual hydrostatic transmission, zero-turn radius capability.
| Component | Specification |
|---|---|
| Engine | 22 HP Commercial Kohler Command Pro |
| Cutting Deck | 52-inch fabricated steel, 3-blade system |
| Transmission | Dual hydrostatic pumps with wheel motors |
| Fuel Capacity | 6.5 gallons |
| Cutting Height | 1.5 to 5 inches (12 positions) |
| Turning Radius | Zero-turn capability |
| Weight | 785 lbs |
| Speed Range | 0-8 mph forward, 0-4 mph reverse |
| Blade Type | High-lift commercial blades |
| Wheels | Front: 13x6.5-6, Rear: 23x10.5-12 |
Kohler Command Pro 22 HP engine parts and maintenance requirements.
WARNING! Always disconnect spark plug before servicing engine components. Allow engine to cool completely.
52-inch fabricated steel deck with three-blade spindle system.
CAUTION! Always engage parking brake and remove key before servicing cutting system.
12-volt electrical system with key start and safety interlock system.
Components: Battery (12V 250CCA), Starter Motor, Alternator, Safety Switches, Wiring Harness.
Battery: Group U1 (part #YAZ-ELC-BAT). Starter: 12V gear reduction (part #YAZ-ELC-STR). Alternator: 15 amp output (part #YAZ-ELC-ALT). Fuses: 20 amp main, 10 amp accessory. Safety System: Seat switch, blade engagement switch, parking brake switch.
Heavy-duty steel frame construction with commercial-grade components.
Tip: Inspect frame for cracks and rust during routine maintenance.
Ergonomic control layout with dual lever steering and integrated dashboard.
WARNING! Always engage parking brake when dismounting mower.
Regular maintenance intervals for optimal performance and longevity.
| Interval | Service Required | Parts Needed |
|---|---|---|
| Every 8 hours | Check engine oil level | 20W-50 oil |
| Every 50 hours | Change engine oil | YAZ-ENG-OF22, oil |
| Every 100 hours | Replace air filter | YAZ-ENG-AF22 |
| Every 200 hours | Replace spark plugs | YAZ-ENG-SP22 |
| Every 500 hours | Change transmission fluid | YAZ-TRN-FLT, fluid |
Genuine Yazoo parts available through authorized dealers only.
Ordering: Contact local Yazoo dealer with part numbers. Warranty: 3-year commercial warranty on frame, 1-year on engine. Technical Support: Available through dealer network.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Battery/safety switches | Check battery charge; verify safety switches engaged; check fuel. |
| Poor cutting performance | Dull blades/belt tension | Sharpen/replace blades; adjust deck belt tension. |
| Hydrostatic drive issues | Low fluid/belt wear | Check transmission fluid level; inspect drive belts. |
| Excessive vibration | Unbalanced blades/debris | Balance blades; clean deck of debris; check spindle bearings. |
| Electrical problems | Corrosion/bad connections | Clean battery terminals; check wiring connections; test fuses. |
Service: Contact authorized Yazoo dealer for technical support and warranty service.