90-828631 Mercury Mariner Service Manual – 50HP (4-Stroke) Outboards

This genuine Mercury Mariner Service Manual (Part No. 90-828631) is the official factory guide for servicing 50HP 4-stroke Mercury and Mariner outboard engines, beginning with U.S. serial number 0G231123. Published by Brunswick Corporation in 1994, this comprehensive manual is a must-have for technicians, mechanics, and boat owners performing repairs, maintenance, or diagnostics on these models.

Packed with detailed schematics, step-by-step procedures, troubleshooting charts, and specifications, it covers everything from powerhead disassembly to electrical systems and fuel components.

Key Features:

• Covers Mercury/Mariner 50HP 4-stroke outboard engines

• Starting serial number: 0G231123 (U.S.)

• Published by Brunswick Corporation in 1994

• Over 200 pages of detailed technical content

• Includes wiring diagrams, torque specs, and maintenance intervals

• Ideal for DIY repairs or professional servicing

Whether you're restoring an older outboard or keeping a workhorse running smoothly, this service manual offers the reliable, factory-approved information you need.