Evinrude Johnson 25 HP Outboard 1973–1978 Service Repair Manual – PDF Download

🛠️ Evinrude Johnson 25 HP Outboard 1973–1978 Service Repair Manual – PDF Download

🧰 This factory service manual provides detailed instructions for repair, maintenance, and troubleshooting of the Evinrude and Johnson 25 HP 2-stroke outboard motors made between 1973 and 1978. The manual includes full coverage of ignition, carburetor, cooling system, and starter system servicing.

📲 Instant PDF download – fully searchable and printable for convenient workshop use.

🔍 Model Background

The Evinrude Johnson 25 HP Outboard (1973–1978) was a popular and reliable mid-range outboard engine manufactured by Outboard Marine Corporation (OMC). It offered an excellent combination of power, portability, and fuel efficiency for anglers, recreational boaters, and utility craft users during the 1970s.

Powered by a 2-cylinder, 2-stroke engine with a displacement of approximately 521cc, the 25 HP model featured loop-charged scavenging and a single carburetor. These engines were designed to deliver a dependable powerband with good low-end torque and smooth acceleration for small to medium-sized boats.

Offered in both manual and electric start configurations, and with tiller or remote steering options, this outboard was versatile and widely applicable. The motor's dry weight averaged around 115–125 lbs, making it manageable for trailering, launching, or even manual lifting in some cases.

The 25 HP was often favored for use on fishing skiffs, jon boats, dinghies, and sailboat auxiliaries. Known for its durability and straightforward maintenance, the 25 HP stood out as one of OMC’s most popular offerings during the decade.

Today, the 1973–1978 25 HP models are still seen in operation, appreciated for their rugged build and vintage simplicity, especially among classic outboard enthusiasts and restorers.

📄 Manual Details for Evinrude Johnson 25 HP (1973–1978):

• Engine Type: 2-stroke, twin-cylinder
• Fuel System: Carbureted, external fuel tank compatible
• Cooling System: Water-cooled with impeller pump
• Ignition System: Magneto ignition system
• Starting System: Manual recoil start
• Trim & Tilt: Manual tilt system
• Years Covered: 1973–1978
• File Format: PDF (searchable and printable)
• Page Count: 200+ pages

📆 Model Years Covered:

• Evinrude Johnson 25 HP Outboard 1973
• Evinrude Johnson 25 HP Outboard 1974
• Evinrude Johnson 25 HP Outboard 1975
• Evinrude Johnson 25 HP Outboard 1976
• Evinrude Johnson 25 HP Outboard 1977
• Evinrude Johnson 25 HP Outboard 1978

📖 Manual Sections Include:

• Routine Maintenance
• Fuel/oil mix, spark plug gap, idle speed settings
• Fuel System & Carburetor
• Jet sizing, float level, choke adjustment
• Ignition System
• Magneto coil testing, points gap adjustment
• Cooling System
• Water pump and impeller service, thermostat testing
• Powerhead Service
• Piston and ring replacement, gasket service
• Starter System
• Recoil starter rope and spring service
• Electrical Schematics
• Ignition wiring and kill switch diagrams

💾 Format & Compatibility:

• File Type: PDF (Digital Download)
• Searchable & Printable: ✅ Yes
• Compatible with: Windows, macOS, iOS, Android, Linux

🔍 Keywords:

Johnson 25 HP repair manual, Evinrude 25 HP outboard PDF, magneto ignition service, carburetor tuning guide, cooling system maintenance, starter rope repair

❓ Mini FAQ:

Q: Is this manual suitable for both Johnson and Evinrude 25 HP engines?
A: Yes – it covers both brands made between 1973 and 1978.

Q: Can I print the manual by chapters?
A: Absolutely – the PDF supports partial or full printing.

Q: Does it include wiring diagrams?
A: Yes – detailed ignition and kill switch schematics are included.

🧭 Helpful Resources for Johnson & Evinrude Outboard Owners

• Why Every Evinrude & Johnson Outboard Owner Should Own a Service Manual – Find out how a downloadable repair manual can simplify maintenance and help you troubleshoot common problems on your own.
• Outboard Engine Troubleshooter – Not sure what’s wrong with your Johnson or Evinrude engine? Our free tool lists common issues and DIY fixes across all major brands.

🔧 Browse More Johnson & Evinrude Manuals

Note: While our manuals are designed for DIY use, they do not replace professional mechanical training. If you're unsure about a repair or your engine shows serious issues, we strongly recommend visiting a certified marine mechanic. These guides are best suited for owners with basic to moderate mechanical experience.