🏷️ Basic Information Identification Make: Toro Model: 20021 Walk-Behind Mower Year: 1990-2002 Generation: N/A (Specific Model, not generational) 📋 Manual Details Documentation Manual Type: Service/Shop Repair Manual Language: English Page Count: 90 Format: PDF Download File Size: 18.4 MB Features Illustrations Included: Yes Search Functionality: Yes Print Capability: Yes Technical Guidance: Step-by-step ⚙️ Engine Specifications Engine Engine Type: Gasoline Engine (Specific model dependent) Displacement: Not specified in product description Power: Not specified in product description Carburetor Type: Likely float-type (common for era) Ignition System: Magneto/Coil (typical for mowers of this era) 🔧 Transmission Drive Train Type: Self-propelled (likely gear-driven) Gears: Likely variable speed or multiple forward gears 📐 Dimensions Physical Cutting Width: Not specified in product description (typically 21-22 inches for this model type) Weight: Not specified in product description (typically 70-90 lbs) 🔧 Maintenance Routine Oil Change Interval: Refer to manual for specific intervals Oil Capacity: Refer to manual for specific capacity (typically 0.5-0.6 quarts) Spark Plug Type: Refer to manual for specific type Air Filter Maintenance: Refer to manual for cleaning/replacement Blade Sharpening: Refer to manual for recommended frequency 📄 Parts And Service Repair Scope Scope Of Repair: From oil change to transmission swap Diagnostic Aid: Distinguish any problem 📄 Customer Support Guarantee Quality Guarantee: Yes Customer Service: Excellent