Yamaha CV25 Outboard Motor Service Manual

1990 Yamaha Marine CV25 Service Manual for outboard motors. Includes pre-delivery, periodic maintenance, fuel system, power unit, and electrical system procedures. LIT-18616-00-55.

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Document Details

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Document Number / Seller:
28640 / Patrick Williams
File Size:
164.10 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Outboard Motor
Last updated / verified
Aug 28, 2025

Models Covered & Key Technical Specifications

Yamaha Outboard Motor Service Manual: CV25 Yamaha CV25 (LIT-18616-00-55) -- 1990 Service Data & Component Directory | Specification Compendium. Toolkit.

  • Certified Travel Rate: 4,500-5,500 r/min establishes the full throttle operational speed Matrix.
  • Designated Footprint Data: For general use, 160 kg (352 lb) defines the maximum weight Standards.
  • Defined Scan Resolution: The engine type is two-stroke -- signifying the combustion cycle Architecture.
  • Key Power Rating: The average maximum power output is 18.7 (25)/5,000 KW (HP) at r/min Protocol.
  • Primary Velocity Specs: Maximum fuel consumption reaches 12.0 (3.17, 2.64) I (US gal, imp gal)/h Parameters.
  • Baseline Torque Specs: For proper assembly, the crankcase requires 100 Nm (73.7 ft-lb) to achieve secure mounting Norms.

Professional Workshop Service Manual & Technical Specifications

Yamaha CV25 Outboard Motor Service Manual: CV25 Service Manual for Yamaha Marine CV25 outboard Procedure-Database

Product-Line: CV25 // Maintenance-Category: Outboard Motor / CV25 Logic // Product-Line: Service Manual.

Technical Specifications

Component Operational-Logic Architecture
Overall Length 600 mm (in.) 23.6
Overall Width 360 mm (in.) 14.2
Overall Height 1,232 mm (in.) 48.5
Boat Transom Height 501 mm (in.) 19.7
Weight 51 kg (lb.) 112.4
Maximum Output 18.7 (25)/5,000 KW (HP) at r/min 18.7 (25)/5,000
Average Maximum Power I (US gal, imp gal)/h 12.0 (3.17, 2.64) /5,500
Engine Type Two-stroke 2
Spark Plug B7HS (NGK) NGK (10mm)

Table of Contents Summary

  • General Information
  • Electrical System
  • Lower Unit
  • Power Unit
  • Fuel System

Methodically requiring a structured approach, this manual details critical maintenance procedures for the Yamaha CV25 outboard motor. It outlines system operations, including the fuel system, power unit, and electrical components, providing essential information for mechanics and owners alike. The documentation addresses component wear limits and includes torque specifications for critical assembly points to ensure pivot-point integrity.

Disassembly instructions are documented for key components of the power and lower units.

Wear limits are specified for critical engine parts such as piston rings and cylinder bores.

System operation descriptions cover the fuel delivery, ignition, and starting systems.

The documentation addresses the proper function of the electrical system, including the starter motor and charging system.

Assembly instructions are detailed for the power unit and lower unit, ensuring correct reassembly of all components.

...documents torque specifications for critical engine components to ensure proper pivot-point integrity.

FAQ

What **documented** safety precautions are included for handling battery electrolyte? keyboard_arrow_down

89 (174) ml is the recommended minimum reserve capacity for charging, with a minimum coolant performance of 210 Amps at -17.8 C (0 F) to ensure safe operation.

Confirm the **precise** lubrication requirements for the drive shaft. keyboard_arrow_down

Hypoid SAE 90 is the specified gear oil quantity of 790 cm3 (26.69, 27.82 US oz Imp oz) for the drive shaft.

What tools are required for **proper** testing parameters of the ignition system? keyboard_arrow_down

20 degrees ATDC at idling is the specified ignition timing for the engine, with a piston position of 3.91 ± 0.20 mm BTDC at full throttle for optimal performance.

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Reviews (4)

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I found this manual extremely helpful for troubleshooting my motor. The email support was exceptional, with prompt replies and clear guidance. Would buy again!
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The manual is detailed and easy to follow. Customer support was quick to assist when I had questions. Great value for the price!
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Rated 5 out of 5 stars
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New
This service manual has everything you need for maintaining my outboard motor. The download process was smooth, and the response from support was impressive!