Basic Information Identification Make: Chrysler Model: 120 HP Outboard Year: 1971 Type: Outboard Motor Codes Engine Code: Likely 120 HP designation, specific internal Chrysler codes not provided in product info Introduction Market Position Target Audience: Boat owners with basic to intermediate mechanical skills, independent marine service professionals, and dealerships. Enhances owner knowledge for better communication with technicians. Competitive Analysis Value Proposition: Provides factory-level repair information at a fraction of the cost of dealer service, enabling DIY repairs and saving significant money on maintenance and repairs. Comparable to genuine Chrysler service literature. Key Features Content Highlights: Step-by-step instructions, clear diagrams, detailed illustrations, wiring schematics, essential torque specifications, and comprehensive troubleshooting guides. Accuracy: Vehicle-specific information, not generic. Utilizes the same procedures and specifications used by authorized service departments. Manual Details Coverage Areas Main Coverage: Full service, repair, troubleshooting, and diagnostics for the 1971 Chrysler 120 HP Outboard motor. Page Count Estimated Page Count: Not specified, but comprehensive coverage suggests a substantial document (typically 300+ pages for such manuals). Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: PDF Download Manual Coverage Systems Covered Engine Mechanical: Powerhead, pistons, rings, connecting rods, crankshaft, cylinder heads, gaskets, seals. Fuel System: Carburetor(s) (disassembly, cleaning, adjustment, rebuilding), fuel pump, fuel lines, fuel filters. Ignition System: Magneto, ignition timing, spark plugs, ignition coils. Electrical System: Electric starter motor, starter solenoid, manual starter, wiring harness, alternator, battery charging system, electrical components. Cooling System: Water pump, cooling passages, thermostat (if applicable). Exhaust System: Exhaust manifold, exhaust housing. Gear Housing And Drive: Gear housing, lower unit, propeller shaft, gears, water pump impeller, seals, lubrication. Steering And Controls: Steering handle, throttle controls, shift controls, cables, linkages. Procedures Included Maintenance: Scheduled maintenance, tune-up procedures, lubrication, fluid changes, winterization, spring preparation. Troubleshooting: Diagnostic flowcharts, common problems and their solutions, symptom analysis. Repair: Step-by-step disassembly, assembly, and rebuilding procedures for all major components. Diagnostics: Detailed diagnostic procedures for electrical and mechanical systems. Technical Depth Depth: Comprehensive, covering everything from basic tune-ups to complete engine and lower unit rebuilds. Includes factory-level procedures. Manual Specifications File Format Compatibility: All versions of Windows and Mac. Requirements: Adobe PDF Reader. Print Quality Printability: Yes, all pages are printable for workshop use. Binding Type Binding: Not applicable (PDF download). Paper Type Paper Type: Not applicable (PDF download). Engine Specifications Primary Engine Horsepower: 120 HP (Horsepower) Performance Engine Type: Likely a V4 or V6 gasoline engine configuration based on the horsepower rating and era for outboard motors of this class. Specific cylinder count and configuration not detailed in product info. Displacement: Specific displacement not provided, but common for 120 HP outboards of this era to be in the range of 100-150 cubic inches. Fuel System Carburetion: Multiple carburetors likely for optimal performance, specific number and type not detailed in product info. Transmission Standard Type: Lower unit with forward, neutral, and reverse gears. Specific internal gear ratios are detailed within the manual. Optional Features: Not applicable, standard gear case for the model. Features Lubrication: Specific gear oil type and capacity (e.g., SAE 80 or 90W marine gear lubricant) detailed in the manual. Dimensions Exterior Motor Type: Outboard Motor Weights Estimated Weight: Typically in the range of 250-350 lbs for a 120 HP outboard of this era, specific weight not provided. Safety Features Ratings Safety Standards: Focuses on safe operating procedures and maintenance to ensure reliability and safety on the water. No specific crash test ratings apply. Active Features Operation: Manual covers safe start-up, operation, and shutdown procedures. Technology Features Infotainment Not Applicable: No infotainment or electronic driver assistance features in the modern sense. Technology focused on mechanical reliability and performance. Driver Assistance Not Applicable: N/A Maintenance Service Intervals Tune Up: Recommended annually or every 100 hours of operation, covering spark plugs, fuel filters, water pump impeller, gear lube, and general inspection. Specific intervals detailed in manual. Fluid Specifications Engine Oil: Two-stroke outboard engine, requiring a specific TC-W3 or equivalent marine two-stroke oil mixed with gasoline at a specified ratio (detailed in manual). Gear Lubricant: Marine-grade gear lubricant, typically SAE 80W or 90W. Manual specifies exact type, capacity, and change intervals. Known Issues Common Problems: Typical for outboards of this era: carburetor gumming, water pump impeller wear, corrosion, ignition system issues (magneto/points). Manual addresses diagnosis and repair for these. Parts Replacement Spark Plugs: Specific spark plug type and gap (e.g., Champion, AC, NGK) provided in the manual. Fuel Filters: Specific fuel filter part numbers and replacement intervals detailed. Water Pump Impeller: Critical wear item; manual provides replacement procedures and recommended intervals. Vehicle History Brand Heritage Manufacturer: Chrysler Marine Division was a significant player in the outboard motor market during the mid-20th century, known for producing robust and reliable engines. Model Evolution Era Context: The 1971 model represents a period of advancement in outboard motor technology, moving towards higher horsepower and...