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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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Mercury Models Covered & Key Technical Specifications

Models: Mercury MerCruiser 262 CID (4.3L) Marine Engines, MCM (Sterndrive) Models
Sub-models / Variants: MCM 4.3L Alpha, MCM 4.3L Bravo, MCM 4.3LH Alpha, MCM 4.3LH Bravo, MCM 4.3L EFI Alpha, MCM 4.3L EFI Bravo
Build Years: 1999
Serial Numbers: 0L619083 and Below, 0L619084 and Above
Technical Data:

  • Engine displacement: 262 CID (4.3 L)
  • Configuration: V-6
  • Compression ratio: 9.4:1
  • Bore: 4.00 in. (101.6 mm)
  • Stroke: 3.48 in. (88.4 mm)
  • Horsepower range: 190 HP – 210 HP (SAV1 Rating)
  • Firing order: 1-6-5-4-3-2
  • Electrical system: 12 V Negative (–) Ground
  • Idle speed: 600–650 RPM (model dependent)
  • Maximum RPM (WOT): 4400–4800 RPM
  • Thermostat rating: 160° F (71° C)
Technical Specifications
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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-Engines-Sterndrives
Last updated / verified
Oct 10, 2025

Mercury Manual Features & Content Preview

Mercury MerCruiser 262 CID (4.3L) Marine Service Documentation

  • Covers 1999 Mercury MerCruiser 262 CID (4.3L) marine engines, including 4.3L, 4.3LH, and 4.3L EFI configurations for Alpha and Bravo sterndrive systems
  • Official Mercury Marine publication 90-861328--1, issued November 1999
  • Contains 47 detailed exploded-view diagrams, 12 electrical system wiring schematics, and extensive torque specification tables for engine and drive components
  • File delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • Stored against your account so you can retrieve it after a hard-drive loss
  • This 1999 publication is the reference document for the 4.3L V-6 marine engine series, detailing the integration of Alpha and Bravo drive systems with fuel-injection and carbureted fuel delivery

Engine and Fuel System Documentation

This factory service manual details the maintenance, disassembly, and assembly of the 1999 Mercury MerCruiser 262 CID (4.3L) engine. The document covers the full range of marine-specific components, including starting systems, ignition (Thunderbolt V), charging systems, and power steering diagnostics. Section 5 provides in-depth information for fuel delivery, covering Mercarb 2-barrel and Weber 4-barrel carburetors, as well as the Electronic Fuel Injection (EFI) system operation, including diagnostic trouble codes and sensor functions.

Technical Specifications and Maintenance Data

Engine mechanical specifications provide critical data such as the 9.4:1 compression ratio and 4.00 inch cylinder bore measurements. The manual provides cooling system capacity of 20 quarts (19 liters) for closed systems, while seawater cooling systems require 15 quarts (14.1 liters) for winterization procedures. Idle speed for the 4.3L EFI models is documented as 600 RPM, whereas carbureted versions are specified at 650 RPM in neutral. This official Mercury Marine factory manual serves as the primary technical reference for the 1999 4.3L V-6 sterndrive line, documenting engine assembly, chassis, electrical, and fuel-injection specifications for these marine power packages.

Document Reference: Publication 90-861328--1, November 1999

Manual FAQ, Purchase & Download Details

Does this manual include wiring diagrams and connector references for the electrical sections? keyboard_arrow_down

Chapter 4 includes extensive documentation for electrical systems, such as starting and charging circuit diagrams, wiring colors, and instrumentation references.

What technical reference categories appear in the maintenance and specification tables for the 262 CID engines? keyboard_arrow_down

Manual contains specification tables that list engine bore and stroke dimensions, compression ratios, and rated power outputs. Additionally, maintenance sections outline fluid capacities, lubricant recommendations, and scheduled maintenance intervals for these specific engines.

Which engine components or systems receive the most comprehensive coverage in the service manual? keyboard_arrow_down

Document provides broad coverage across all major systems, including the engine block, fuel delivery, cooling, ignition, and power steering.

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