Johnson & Evinrude 1958–1972 50–125 HP Outboard Repair Manual (P/N 1306)

This Seloc repair manual (P/N 1306) covers 1958–1972 Johnson and Evinrude 50–125 HP outboards with three-cylinder and V4 two-stroke engines. For the 1972 65 HP three-cylinder, this volume identifies the Type III carburetor application and directs you to Volume IV for engine service.

PDF Search, Bookmarks, and Page Count

Search and wiring detail: OCR makes much of the manual searchable. Some model-table entries and the 115 HP ignition test diagram are missed by text search. Bookmarks jump to the contents, all ten chapters, the appendix, and the wiring diagrams. Zoom in to read small wire and connector labels in dense diagrams.

The download is one printable English-language PDF with 526 pages total, including one cover page, seven contents pages, 488 chapter pages, and 30 appendix pages. The wiring diagrams are part of the appendix.

Powerhead Service, Ignition Testing, and Gearcase Repair

Service highlights include the jobs below. The manual also covers hand-starter service, care after submersion, and winter storage and preseason preparation.

• Powerhead repair: Engine removal and installation, cylinder inspection and honing, piston and connecting-rod service, crankshaft bearings, reed assemblies, and crankshaft seals.
• Fuel system: Carburetor overhaul and float adjustment, fuel-pump and fuel-line tests, and service for heat/electric, all-electric, and water-operated chokes.
• Ignition and tuning: Compression checks, distributor magneto and battery ignition service, capacitor-discharge (CD) troubleshooting, distributor-belt timing, and ignition-to-carburetor synchronization.
• Starting and charging: Bendix drive service, Delco-Remy, Autolite, and Prestolite starter repair, generator overhaul, and alternator, regulator, and rectifier tests.
• Lower units and controls: Manual-shift, Electromatic, and Hydro-Electric diagnosis, gearcase overhaul, step-by-step water-pump service, shift-box repair, and control-cable adjustment.
• Workshop references: Model-specific torque and timing tables, powerhead clearances, gear-oil capacities, electrical test specifications, exploded drawings, and model-specific wiring diagrams.

This manual is suited to mechanics and experienced owners familiar with two-stroke outboards and the electrical test equipment specified for CD ignition diagnosis.

Powerhead Rebuilding and Cooling

The powerhead chapter distinguishes piston orientation and needle-bearing arrangements across engine configurations. Cylinder head service includes the staged bolt-tightening sequence, thermostat and bypass-valve inspection, and checks for corroded water passages. The Type V lower-unit section gives separate water-pump instructions for the original and updated housings.

Carburetor and Fuel-Pump Service

The fuel chapter distinguishes adjustable-needle and fixed-orifice carburetors. An exploded drawing identifies the parts of the four-barrel Type II carburetor, and its float procedure specifies OMC tool 380546. The chapter also covers the individual Type III carburetors used on the three-cylinder engines and identifies which fuel pumps can be rebuilt and which are limited to filter and gasket service.

Ignition Faults and Shift Diagnosis

CD troubleshooting separates sensor-triggered systems from breaker-point systems. The 115 HP ignition diagram ties numbered tests to individual components. Rotor illustrations show how to distinguish the similar-looking magneto and battery-ignition rotors. Fitting the wrong rotor can keep the engine from developing full power. Follow the manual’s precautions for fuel vapors and electrical testing.

The lower-unit chapter explains how to distinguish split and enclosed manual-shift housings, the Type III and heavier Type IV Electromatic units, and the hydraulically actuated Type V. Separate shift-box and gearcase tests help you trace a shift fault to the controls, wiring, or gearcase before teardown. The Hydro-Electric shift-circuit schematic supports those checks, and the appendix includes wire-identification drawings for the 85 HP V4 electric-shift and 125 HP V4.

The lubrication section warns that mistaking the Phillips shift-fork retaining screw for a lubricant plug can displace the fork and require gearcase disassembly.

Examples of Shift-Coil Tests and Gear-Oil Capacities

For Type V electric-shift lower units, the manual specifies shift-coil resistance of 5–7 ohms from each disconnected green or blue lower-unit lead to engine ground.

The gear-oil table specifies 17.4 ounces for the 1962–1965 75 HP electric-shift gearcase and 34.8 ounces for the 1964–1965 75 HP HD gearcase. The separate entries show why the gearcase version matters even when the horsepower matches.