90-861329-1 Service Manual – MerCruiser GM 4-Cylinder 181 CID (3.0 L)

90-8613291 Service Manual

The 90‑861329‑1 Service Manual is the official factory-issued guide for MerCruiser GM 4‑Cylinder 181 CID (3.0 L) engines. Published in March 1999 as Manual No. 26, it offers comprehensive, dealer-level instructions for engine overhaul and maintenance.

System Coverage & Use

This manual supports models from 1998 onward. It spans critical components such as the Alpha drive, engine, electrical systems, fuel system, cooling, exhaust, and power steering. It’s designed for both professional mechanics and savvy DIYers.

Technical Highlights

Inside, you'll find:

• Clear exploded diagrams and engine schematics

• Step-by-step service procedures for disassembly, diagnostics, and tuning

• Safety warnings, torque specs, and maintenance schedules aligned with Mercury’s OEM standards
  All content is organized meticulously to support accurate servicing.

Format & Availability

This manual is available in two formats:

• Used printed copy—typically in good condition with full content intact.

• Digital PDF version—bookmarked, indexed, and searchable for efficient digital use.

Arizona Outboard Dismantlers supplies authentic marine manuals trusted by professionals and DIY enthusiasts alike. Thus, the 90-8613291 Service Manual ensures factory-level clarity and reliability for all your engine care needs.