This comprehensive service repair manual covers Johnson and Evinrude outboard motors ranging from 1.25 to 70 horsepower, encompassing models manufactured between 1990 and 2001. It provides detailed, step-by-step instructions, accompanied by numerous photos and illustrations, to guide you through a wide range of procedures, including repairs, maintenance, overhauls, servicing, troubleshooting, and specification details. This expert guide empowers you with the knowledge and experience necessary to handle both basic maintenance tasks and more complex service procedures, such as engine overhauls. This manual is your ultimate resource for addressing any issue that may arise with your 1990-2001 Johnson or Evinrude outboard engine. The manual's clear and organized structure, with bookmarked chapters, ensures quick and efficient navigation. You can easily find the specific repair procedure you need, saving time and effort. The manual covers a vast array of technical information, including: * **Specifications:** Learn about key specifications, such as overall length, width, weight, transom height, operating range, idle speed, engine type, number of cylinders, displacement, spark plug details, fuel system, exhaust system, cooling system, lubrication system, starting system, recommended fuels, gearcase oil capacity, maximum tilt angle, transmission details, propeller shaft rotation, cylinder compression, engine oil pressure, viscosity ratings, oil change procedures, and much more. * **Maintenance:** This section provides comprehensive maintenance specifications, charts, intervals, and recommendations, along with detailed step-by-step procedures for tasks such as: * Spark plug replacement * Fuel line replacement * Breather hose replacement * Engine oil change * Gear oil change * Lubrication * Anodes and bonding wire maintenance * Battery maintenance * Fuel mixture check * Engine oil filter replacement * Low and high-pressure fuel filter replacement * Ignition timing adjustment * Idle speed adjustment * Tappet clearance adjustment * Water pump inspection and replacement * Water pump impeller replacement * Propeller nut and pin maintenance * Balancer chain inspection * Timing belt inspection * Lubrication point maintenance * **General Information:** Get essential information on identification numbers, tightening torques, service data, cylinder number, propeller types, recommended gasoline grades, warm-up procedures, and more. * **Electrical System:** This section covers the removal and installation of electrical parts, as well as inspection, removal, installation, and troubleshooting procedures for components like: * Monitor tachometer * Starter motor * Electric starter system * Battery charging system * Disassembly, cleaning, testing, brush replacement, and reassembly of components * Battery charging system tests * Testing the battery charging coil, battery charging system, and rectifier/regulator * **Ignition System:** Dive into detailed information about: * Specifications * Special tools * Ignition timing checks * Spark plug firing order * Charge coil resistance * Crank position sensor resistance * Ignition coil resistance * ECM engine speed limiter * Spark cut-out reduction * Ignition spark * ECM low oil pressure speed control * Oil pressure switch * **Carburetor System:** Find complete instructions for adjusting, rebuilding, removing, inspecting, and cleaning your carburetor to factory specifications. This section includes information on: * Specifications * Special tools * Intake carburetor adjustments * Idle speed linkage adjustment * Choke adjustment * Carburetor removal * Carburetor disassembly * Cleaning, inspection, and repair * Carburetor reassembly * Float height measurement * Carburetor installation * Electric choke model installation * Idle RPM (out of gear and in forward gear) * Wide open throttle RPM (WOT) * Main jet and pilot jet sizes * Float height * And much more * **Electronic Fuel Injection (EFI) System:** Learn about the EFI system, including: * Specifications * Fuel injection nozzle * Fuel injection pump * Fuel pump * Throttle body * Throttle control lever and linkage * High-pressure fuel line * Fuel cooler * Fuel hoses * Fuel rail pressure regulator * Idle speed control assembly * Intake manifold * Throttle position sensor * Low-pressure fuel line/fuel pump * Fuel filter * Fuel pump * **Powerhead:** This section covers every aspect of rebuilding your engine block to factory specifications, including: * Cylinder head cover * Intake manifold assembly * Ring gear cover * Air intake power unit (powerhead) * Measuring pump components * Oil pump * Engine lubrication system * Thermostat * Cylinder * Crankshaft * Piston * Counter balancer mechanism * Cylinder head assembly removal, inspection, and installation * **Mid-Section:** Learn about components like: * Engine side cover * Driveshaft housing * Oil pan * Swivel bracket * Steering bracket and clamp * Water pressure valve * Lower unit gear housing * Inspection, removal, installation, cleaning, assembly, and reassembly procedures * **Lower Unit:** This section covers the gearcase, propeller, lower unit gears, shimming and adjustment, trim tab, driveshaft, oil seal housing, water pump and related components, shift guide housing, propeller shaft components, gear bearing, propeller shaft gear housing, and more. * **Attachments/Control Linkage:** Find information on attachments and control linkage components. * **Throttle/Shift Linkage:** Learn about the throttle and shift linkage system. * **Tiller Handle:** This section covers the tiller handle. * **Manual Starter:** Get instructions on the manual starter system. * **Diagnostic Troubleshooting:** This section provides valuable troubleshooting information. * **Wiring Diagrams:** Find detailed wiring diagrams for your outboard motor. The manual is your complete resource for maintaining, repairing, and understanding your Johnson and Evinrude outboard motor. Its comprehensive coverage, detailed instructions, and numerous illustrations make it an essential tool for any owner or mechanic.

The 1990-2001 Johnson Evinrude Service Repair Manual for 1.25 to 70 HP outboard motors is an essential resource for anyone who owns or works on these popular and reliable marine engines. This comprehensive manual provides step-by-step instructions, detailed diagrams, and troubleshooting tips for all aspects of maintenance and repair, covering a wide range of models from the compact 1.25 HP to the powerful 70 HP. From basic tasks such as spark plug replacement and carburetor cleaning to more complex procedures like engine rebuilds and electrical system diagnosis, this manual equips users with the knowledge and guidance necessary to keep their Johnson/Evinrude outboard motors running efficiently and reliably. This manual is a valuable tool for both experienced mechanics and novice DIYers. It features a user-friendly layout with clearly labeled sections, making it easy to navigate and find the specific information needed. Detailed exploded diagrams illustrate the components of each system, aiding in understanding how parts fit together and function. The manual also includes comprehensive troubleshooting charts that help pinpoint the root cause of engine problems, saving time and frustration. Whether you are a seasoned marine technician seeking to enhance your expertise or a boat owner looking to save money by performing routine maintenance yourself, this service repair manual is an indispensable resource for all Johnson/Evinrude outboard owners.