This manual provides comprehensive service and repair information for the 1970 Chrysler 120 HP outboard motor. Known for its robust engineering and reliability, Chrysler outboard motors of this era offered significant power for recreational boating. The 120 HP model, an Inline 6-Cylinder, 2-Stroke engine, was designed to deliver strong performance for fishing, watersports, and general cruising, reflecting Chrysler's heritage in the marine industry. This workshop manual is intended to offer factory-level service details, empowering owners and independent mechanics with the knowledge to maintain and repair this capable engine. The scope of this manual covers a wide array of critical systems and procedures, including detailed specifications for the engine, torque settings, and tune-up procedures. It thoroughly explains the carburetor, starter systems (manual and electric), ignition (magneto and alternator), fuel system, gear housing, motor leg, powerhead assembly, and steering components. With mechanic-level detail, step-by-step instructions, diagrams, illustrations, and wiring schematics, this guide facilitates routine maintenance, troubleshooting, component removal and installation, and the rebuilding of various parts. It serves as an indispensable resource for ensuring the longevity and optimal performance of your 1970 Chrysler 120 HP outboard.