90-828631 Service Manual – Mariner/Mercury 45–50HP 4-Stroke (1995)

The Mariner Mercury 45HP Manual (part number 90-828631) is the official factory guide for servicing 45–50 horsepower 4-stroke outboards. Printed by Brunswick in 1995, it includes accurate procedures, diagrams, and torque specs for engines beginning at U.S. serial 0G231123.

This manual covers the powerhead, timing belt, valves, fuel system, ignition, and cooling systems. It features exploded diagrams and easy-to-follow steps to assist with cylinder head servicing, gasket replacement, fuel pump work, and valve adjustments. Troubleshooting charts lead you through diagnosing faults before they become serious.

Organized in a logical format, the guide lets you move smoothly from disassembly to inspection and reassembly. Because it’s a genuine manufacturer manual, it contains only precise Mariner/Mercury specifications.

Arizona Outboard Dismantlers offers real factory manuals like this Mariner Mercury 45HP Manual to help you maintain reliability, protect your investment, and stay on the water longer.