1996-2000 Yamaha T25Y Outboard Motor Supplementary Service Manual
Yamaha T25Y troubleshooting and repair reference manual covering 1996-2000 models, including engine, lower unit, and electrical systems. LIT-18616-02-20.
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Sample pages from the 1996-2000 Yamaha T25Y Outboard Motor Supplementary Service Manual manual
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Models Covered & Key Technical Specifications
Yamaha T25Y (1999-2000) (LIT-18616-02-20) - Supplementary Service Manual Technical-Repository
| Yamaha T25Y | Supplementary Service Manual Repository
- Engine Specifications: 498 cc displacement, 2 cylinders, and 4-stroke OHC in-line configuration.
- Performance Metrics: Maximum output of 18.4 kW at 5,500 RPM, with a full throttle range of 5,000-6,000 RPM.
- Weight: The outboard motor weighs 84.0 kg (185.2 lbs) with an aluminum propeller.
- Fuel and Oil: Uses unleaded regular gasoline and SAE 90 gear oil.
- Ignition Timing: Standard ignition timing is set between 7.5 - 30.0 ± 3.0 degrees BTDC.
- Starter Motor: Features a Bendix starter motor with an output of 0.8 kW.
Professional Workshop Service Manual & Technical Specifications
Yamaha T25Y (1999-2000) Supplementary Service Manual: Yamaha Outboard Motor Technical-Repository
Diagnosis: Power Unit // Coverage: Engine, Lower Unit // Maintenance: Specifications
Service chapters address power unit, lower unit, bracket unit, and electrical systems. Component locations are identified within the exploded diagrams.
Power Unit Details
Maintenance intervals are documented for engine oil, oil filter, timing belt, and valve clearance adjustments.
Lower Unit Procedures
Gear oil specifications and lower unit leakage checks are included.
Electrical System Documentation
Includes CDI unit output peak voltage, pulser coil resistance, and charging system details.
Torque Specifications
The manual documents torque specifications for various components to ensure proper rotational loosening prevention.
Carburetor and Fuel System Information
Details on fuel filters, fuel pumps, and carburetor inspection are provided.
Specifications Table
| Component | System-Path | Logic |
|---|---|---|
| Engine Displacement | Power Unit | 498 cc |
| Maximum Output | Performance | 18.4 kW |
| Engine Oil Type | Lubrication | 4-stroke OHC |
| Gear Oil Grade | Lubrication | SAE 90 |
| Ignition Timing | Ignition System | 7.5 - 30.0° BTDC |
| Weight w/ Propeller | Dimensions | 84.0 kg |
Engineering chapters address the power unit, lower unit, bracket unit, and electrical systems. Procedures cover disassembly, assembly, and component inspection to ensure consistent operation.
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