90-858895 – Mercury Mariner Service Manual 75–90HP 4-Stroke (1999)

The 90-858895 Mercury 75/90HP 4/Stroke Manual  provides complete factory-authorized instructions for servicing and repairing 75HP and 90HP 4-Stroke outboard motors manufactured in 1999 and newer. This manual is the official technical reference for mechanics, marine service centers, and boat owners looking for accurate repair procedures.

Developed by Mercury Marine, this service manual covers all major systems, including the powerhead, ignition, fuel delivery, cooling, gearcase, lubrication, and electrical wiring. It includes torque specifications, exploded-view diagrams, and troubleshooting guides to help ensure correct repairs. Each procedure is presented with step-by-step clarity and factory precision.

The Mercury 75/90HP 4/Stroke Manual  (90-858895) also provides detailed instructions for powerhead removal, cylinder block servicing, valve adjustments, and complete engine disassembly. Exploded diagrams and labeled components make it easy to identify and service every part of the engine.

This edition applies to United States outboards with serial numbers 0G960500 and above, making it suitable for engines built in 1999 and later. With this manual, both professional technicians and DIY owners can ensure their Mercury/Mariner 75–90HP 4-Stroke engines remain reliable and well maintained.

Key Features:

• Part Number: 90-858895

• Models Covered: Mercury/Mariner 75HP & 90HP (4-Stroke)

• Year: 1999 and newer

• Serial Range: 0G960500 and above (U.S.)

• Includes torque specs, exploded diagrams, and troubleshooting

• Covers powerhead, ignition, gearcase, and electrical systems

• Official Mercury Marine service publication

At Arizona Outboard Dismantlers, we supply factory service manuals and high-quality marine parts to help you maintain peak performance. The 90-858895 manual is a must-have reference for anyone servicing Mercury Mariner 75–90HP 4-Stroke outboards.