2A441953 Service Manual – 4.5L Mercury MerCruiser

The 2A441953 Service Manual is a genuine Mercury factory guide for 4.5 L MPI V6 MerCruiser engines. It provides the procedures, specs, and wiring details technicians use for accurate maintenance and repair.

Covered Models & Serial Range

This service information applies to 4.5 L MPI 250 HP MerCruiser sterndrive packages within the serial range that begins at 2A441953 (commonly shown as 2A441953 thru 2A530777 on parts lookups).

Technical Content & Diagnostics

Inside, you’ll find:

• System overviews for fuel, ignition/PCM, cooling, and lubrication

• Wiring diagrams and harness callouts used during troubleshooting

• Torque specifications, fluids, and clearances for assembly work

• Step-by-step diagnostic trees and maintenance schedules

These sections mirror the structure of Mercury’s factory “Service & Support Material” for the 4.5 L platform, ensuring consistent procedures and specs.

Publication Details

This edition corresponds to Mercury’s 4.5 L MerCruiser service manual publication line released for the 2015 model year (e.g., printed titles labeled 90-8M0103372). Printed service manuals are the official format Mercury supplies for dealer-level service.

At Arizona Outboard Dismantlers, we specialize in genuine and aftermarket marine parts that keep you on the water. This 2A441953 Service Manual delivers the factory-grade data you need for confident, correct servicing.