OMC 4749-4 Outboard Service Repair Manual

( Brand: Omc ), ( Part Type: Hp Manual ), ( Manufacturer Part Number: 4749 4 ), ( Media Type: Service Repair Manual )

Review OMC Evinrude Outboard Service Repair Manual Hp fits SPORTSTER 1971–2025

OMC 4749 1971 Evinrude Outboard Service Repair Manual for 25 HP Sportster 25102, 2510

This detailed and comprehensive service repair manual, OMC 4749, is specifically designed for the 1971 Evinrude Outboard 25 HP Sportster models with the serial numbers 25102 and 2510. This manual provides in-depth information for the repair, servicing, and maintenance of these classic outboard engines.

The manual begins with an introduction to the engine, including its specifications and components. It covers essential topics such as engine identification, model history, and general engine operation. This information serves as an excellent foundation for anyone seeking to understand and work on these engines.

1. Engine Overhaul: This section provides step-by-step instructions for disassembling, inspecting, and reassembling the engine. It covers essential components such as the cylinder block, pistons, cylinder head, crankshaft, camshaft, and timing gears.

2. Lubrication System: The manual covers the engine's oiling system in detail, explaining how to change oil filters, oil pumps, and oil coolers. It also provides instructions for checking and adjusting oil levels.

3. Cooling System: This section covers the cooling system's disassembly, inspection, and reassembly. It includes information on radiators, water pumps, thermostats, and cooling hoses.

4. Electrical System: The manual provides detailed instructions on the electrical system, including wiring diagrams, starter motors, and ignition systems. It also covers charging systems and battery maintenance.

5. Fuel System: The fuel system is another essential component covered in the manual. It includes instructions on carburetors, fuel systems, fuel filters, and fuel pumps.

6. Exhaust System: The manual covers the engine's exhaust system, including mufflers, exhaust manifolds, and exhaust valves. It provides instructions on how to diagnose and repair common exhaust system issues.

7. Propeller and Shaft: The manual covers propellers, shafts, and related components such as cutless bearings, stuffing boxes, and propeller keys. It provides information on how to service and replace these parts.

8. Steering and Controls: The manual covers the steering and control systems, including cables, linkages, and hydraulic systems. It provides instructions on how to diagnose and repair common steering and control issues.

9. Propeller Hub and Stern Drive: The manual covers the propeller hub and stern drive components, including gear cases, propshafts, and cutlass bearings. It provides instructions on how to service and replace these parts.

10. Accessories: The manual covers various engine accessories, including fuel tanks, batteries, and electrical components. It provides instructions on how to install, service, and repair these accessories.

The OMC 4749 1971 Evinrude Outboard Service Repair Manual for 25 HP Sportster 25102, 2510 is an essential tool for anyone seeking to repair, service, or maintain these classic outboard engines. With its comprehensive and detailed instructions, this manual ensures that users have the knowledge and confidence to tackle any repair or maintenance task with ease.

OMC 4749 1971 Evinrude Outboard Service Repair Manual for 25 HP Sportster 25102 2510: A Comprehensive Analysis

The OMC 4749 1971 Evinrude Outboard Service Repair Manual for 25 HP Sportster 25102 2510 is an essential resource for boat owners and technicians who need to repair or maintain their Evinrude outboard engines. In this analysis, we will discuss the advantages and disadvantages of purchasing this manual.

1. Comprehensive Coverage: The manual covers a wide range of repair and maintenance topics, making it an excellent investment for anyone who owns or works on a 1971 Evinrude 25 HP Sportster 25102 2510 outboard engine.

2. Detailed Instructions: The manual provides step-by-step instructions for performing various repairs and maintenance tasks, making it easier for individuals to complete the work themselves, saving on labor costs.

3. High-Quality Construction: The manual is well-bound and printed on high-quality paper, ensuring that it will last for many years.

4. Cost-Effective: Compared to the cost of hiring a professional technician for every repair or maintenance task, purchasing this manual can save boat owners a significant amount of money in the long run.

5. Access to Expert Knowledge: The manual is written by Evinrude engineers and technicians, providing users with access to the expert knowledge and experience of the company.

1. Limited to Specific Engine Model: The manual is only applicable to the 1971 Evinrude 25 HP Sportster 25102 2510 outboard engine, making it less versatile than manuals that cover multiple engine models.

2. May Need Supplemental Resources: While the manual covers many topics, some repairs or maintenance tasks may require additional resources, such as special tools or replacement parts.

3. Outdated Information: Since the manual is for a 1971 engine model, some of the information may be outdated, particularly with regard to newer technologies or repair methods.

In conclusion, the OMC 4749 1971 Evinrude Outboard Service Repair Manual for 25 HP Sportster 25102 2510 is an invaluable resource for anyone who owns or works on a 1971 Evinrude 25 HP Sportster 25102 2510 outboard engine. While it has some limitations, such as being limited to a specific engine model and containing some outdated information, the benefits, including comprehensive coverage, detailed instructions, high-quality construction, cost-effectiveness, and access to expert knowledge, far outweigh the drawbacks.

If you own or work on a 1971 Evinrude 25 HP Sportster 25102 2510 outboard engine, we highly recommend purchasing this manual as an investment in your ability to maintain and repair your engine effectively and efficiently.

part # 47494 prices

• $25.95-$33.88

specifications crafttract:

• for models: Sportster
• for makes: Evinrude, Omc
• for years: 1971-2025
• brand: Omc
• part type: Hp Manual
• manufacturer part number: 4749 4
• media type: Service Repair Manual

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general crafttract:

• Parts Accessories > Manuals Literature > Boats Watercraft
• condition: Used

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• # reviews: 30605
• rating: 99.9%

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• started: June 17, 2026
• availability: In Stock
• options: Ship-to-home

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• cost: $0.00
• service: Standard, USPS Priority Mail
• transit: 5-8 Days
• carrier: USPS
• class: Standard, Expedited

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