🏷️ Basic Information Identification Make: Lawn-Boy Model: D450 Year: 1963 Generation: D450 Series 📋 Manual Details General Manual Type: Service/Shop Repair Manual Manual Format: PDF Page Count: 635 File Size Mb: 138 Language: English Content Coverage: Comprehensive (every nut and bolt) Features Illustrations: Included Searchable: True Printable: True Source Provider Description: Factory trained technician knowledge ⚙️ Engine Specifications General Engine Type: Not specified (typical for this era: gasoline, 4-stroke, air-cooled) Displacement Cc: Not specified (typically between 150-250cc for this model series) Performance Horsepower: Not specified (typically around 3-5 HP) 🔧 Transmission General Type: Not specified (likely manual clutch with gear reduction or belt drive) Gears: Not specified 📐 Dimensions Physical Length In: Not specified Width In: Not specified Height In: Not specified Weight Lbs: Not specified 🔧 Maintenance Routine Oil Change Frequency: Refer to manual Lubrication Oil Type: Refer to manual Oil Capacity Qts: Refer to manual 📄 Parts Identification Serial Number Range: 300000001-399999999 📄 Diagnostics Troubleshooting Problem Identification: Covered (from oil change to transmission swap) 📄 Operation Learning Learning Curve: Step-by-step guidance