Mercury MerCruiser 262 CID (4.3L) Inboard Engine Service Manual

Complete service documentation for Mercury MerCruiser 4.3L (262 CID) engines. Includes procedures for disassembly, inspection, assembly, and adjustment. Part Number 90-861328-1.

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Document Details

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Document Number / Seller:
31534 / Ronald Rodriguez
File Size:
10.88 MB
File Type:
PDF
Language:
English
Pages:
790
Printable:
Yes
Category:
Inboard Engine (Sterndrive)
Last updated / verified
Oct 10, 2025

Models Covered & Key Technical Specifications

Mercury MerCruiser 262 CID (4.3L) (90-861328-1) - MCM Models (Sterndrive) / MCM (Sterndrive) Comprehensive service documentation addressing engine disassembly, inspection, assembly, and adjustment.

  • Published Technical Data: 190 HP establishes the rated power output Specifications.
  • Specific Engine Configuration: For optimal performance, the V-6 configuration ensures efficient operation.
  • Integral Displacement Measurement: 262 cid -- signifies the total engine displacement Capacity.
  • Operational Bore Sizing: The cylinder bore requires 4.00 in. for standard operation Dimensions.
  • Fundamental Compression Ratio: The engine compression ratio is specified as 9.4:1 Standard.
  • Universal Stroke Measurement: Piston stroke measures 3.48 in. for optimal engine stroke Parameters.

Professional Workshop Service Manual & Technical Specifications

OEM-Grade Operations Manual: Mercury MerCruiser 262 CID (4.3L) Inboard Engine Service Manual (Number 25) - Comprehensive Diagnostics & Maintenance

System-Identifier: 262 CID (4.3L) Engines / MCM (Sterndrive) // Conceptual-Layout: Engine / Sterndrive Logic // Serial-Range: 1998-2001 Specification-Guide

Identifier Parameters Logic
Engine Model 4.3L Standard
Displacement 262 CID (4.3L) Core
Bore x Stroke 4.00 x 3.48 in. Baseline
Compression Ratio 9.4:1 Engine Data
Firing Order 1-6-5-4-3-2 Ignition Sequence
Torque Specs 18 lb-ft (25 Nm) Fastener Values

Integrated service sections encompass:

  • Introduction and How to Use This Manual
  • Maintenance Schedules and Intervals
  • Engine Tune-Up Specifications
  • Troubleshooting Guides for Common Issues
  • Removal and Installation Procedures

Engine Overview and Systems

Safely requiring... This document details the engine's core mechanical systems, including the crankshaft, piston assemblies, and valve train components. It provides thorough instructions for their removal, cleaning, inspection, and installation.

Maintenance and Tune-Up Procedures

This manual covers essential maintenance tasks such as fluid changes, component inspections, and tune-up procedures. It guides the user through tasks like checking oil levels, replacing filters, and setting ignition timing for optimal engine performance.

Troubleshooting and Diagnostics

Detailed troubleshooting charts and diagnostic procedures are provided to help identify and resolve common engine issues. From starting problems to performance concerns, the manual offers systematic approaches to diagnosis.

documents torque specifications for cylinder head bolts to ensure proper flange face sealing.

FAQ

What **necessary** procedures are involved in checking the ignition system's voltage? keyboard_arrow_down

0 Volts is indicated if the WHT/RED bullet connector from the distributor is unplugged and there is no 12 volts on the lead coming from the module, suggesting a potential ignition module issue.

Determine the **recommended** calibration settings for the engine's ignition timing. keyboard_arrow_down

1300 rpm is the specified engine speed to check ignition timing; if incorrect, rotate the distributor and torque the clamping screw to 18 lb-ft (25 Nm).

What **specifications** are required for calibrated valve clearance measurements? keyboard_arrow_down

.001 in. (0.02 mm) is the maximum wear limit for piston pin bore and piston pin clearance; exceeding this requires replacement of the piston and pin assembly.

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Reviews (3)

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New
Had a question about the troubleshooting section and received a fast response from support. The manual is well-organized and easy to follow!
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New
This manual made my engine overhaul so much easier. The step-by-step instructions were clear and thorough!
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New
The torque specifications were incredibly helpful. I received the download link quickly after purchase, and the diagrams were a great visual aid!