MerCruiser Bravo Sterndrives Service Manual #11 (1990-1998)
This comprehensive MerCruiser Bravo Sterndrives service manual covers models Bravo One, Bravo Two, and Bravo Three from 1990-1998. Includes detailed instructions for disassembly, inspection, and assembly. PN 90-17431-4.
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Models Covered & Key Technical Specifications
MerCruiser Bravo Sterndrives (1990-1998) (90-17431-4)
Bravo Sterndrives / Service & Repair Reference: Bravo One, Bravo Two, Bravo Three
- Verified Tolerance Values: 20-25 lb. ft. (27-34 N·m) is the specified torque for transom assembly attaching screws and nuts.
- Key Interference Fit: 3-5 lb. in. (0.3-0.8 N·m) is the specified rolling preload for new driveshaft bearings.
- Prescribed Electrical Load: Not specified in manual section.
- Nominal Production Rate: Not specified in manual section.
- Design Imaging Specs: Not specified in manual section.
- Designated Clearance Data: 1/8 in. (3 mm) is the specified tolerance for parallel transom surfaces.
Professional Workshop Service Manual & Technical Specifications
MerCruiser Bravo Sterndrives Service Manual #11 (1990-1998)
Engineering-Metrics: MerCruiser Bravo Sterndrives // Model-Portfolio: Bravo One, Bravo Two, Bravo Three / Sterndrive Logic // Series-Validation: Manual #11 (1990-1998)
| Service-Nexus | Value | Framework |
|---|---|---|
| Torque Specifications | 20-25 lb. ft. (27-34 N·m) | For transom assembly attaching screws and nuts |
| Lubricants/Sealers/Adhesives | Quicksilver 2-4-C Marine Lubricant with Teflon | For various lubrication points |
| Special Tools | U-joint Bearing Retainer Wrench | For removing bearing carrier retainer nut |
Maintenance hierarchies are structured into:
- Section 1: General Information (Important Info, Maintenance, Troubleshooting)
- Section 2: Removal, Installation and Adjustments (All Models)
- Section 3: Sterndrive Unit (Drive Shaft Housing, Bravo One/Two/Three Gear Housing)
- Section 4: Transom Assembly (Minor and Major Disassembly Procedures)
- Section 5: Power Trim (Oildyne Trim Pump, Trim Cylinders, Dual Power Trim System, Auto Trim II)
- Section 6: Steering Systems (Power Steering)
- Section 7: Corrosion Protection (All Models)
- Section 8: Accessories
Reference data is included for the Bravo Sterndrive units, covering specifications, special tools, and lubricants. This manual covers the disassembly and reassembly of drive shaft and pinion gear components, including bearing inspection and U-joint procedures. It also details the gear housing disassembly and reassembly for Bravo One, Bravo Two, and Bravo Three models. Diagnostic procedures are covered for power trim systems and steering systems. Wiring diagrams are provided for the Auto Trim II system. Torque specifications are listed for various components to ensure proper assembly and function.
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