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MerCruiser 6.2 MPI - User Manual

MerCruiser 6.2 MPI
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© 2007 Mercury Marine 5.7, 6.2 MPI & Horizon 5.7, 6.2
*864197072*
90-864197072 1107
NOTE: The following applies to CE marked products only.
Declaration of Conformance – Mercury MerCruiser
This sterndrive or inboard engine when installed in accordance to Mercury
MerCruisers’ instructions complies with the requirements of the following directives
by meeting the associated standards, as amended:
Recreational Craft Directive 94/25/EC; 2003/44/EC
Applicable Requirement Standards Applied
Owner’s manual (A.2.5) ISO 10240
Openings in Hull, Deck and superstructure (A.3.4) ISO 9093‑1; ISO 9093‑2
Handling characteristics (A.4) ISO 8665
Inboard Engine (A.5.1.1) ISO 15584; ISO 10088; ISO 7840; ISO 10133
Fuel System (A.5.2) ISO 10088; ISO 7840; ISO 8469
Electrical System (A.5.3) ISO 10133; ISO 8846
Steering system (A.5.4)
Applicable portions of: ISO 10592, ISO 8848 and
ABYC P‑17
Exhaust emission requirements (B.2) ISO 8178
Owner’s manual (B.4) ISO 8665
Noise emission levels (C.1) ISO 14509
Ignition‑protected equipment (Annex II) ISO 8846; SAE J1171; SAE J1191; SAE J 2031
Mercury MerCruiser declares that our sterndrive or inboard engines without integral
exhaust, when installed in a recreational craft, in accordance with the manufacturers
supplied instructions, will meet the exhaust emissions requirements of the directive
mentioned above. This engine must not be put into service until the recreational craft
in which it is to be installed has been declared in conformity, if so required, with the
relevant provision of the directive.
Electromagnetic Compatibility Directive 89/336/EC, 92/31/EEC and 93/68/EEC
Generic emission standard EN 50081‑1
Generic immunity standard EN 50082‑1
Vehicles, boats and internal combustion engine
driven devices ‑ Radio disturbance characteristics
SAE J551 (CISPR 12)
Electrostatic discharge testing EN 61000‑6‑2; EN 61000‑4‑2; EN61000‑4‑3
The notified body responsible for surveillance of the quality system under Full Quality Assurance
Module H of Directive 2003/44/EC is:
Det Norske Veritas
Norway
Notified Body Number: 0575
This declaration is issued under the sole responsibility of Mercury Marine and Mercury MerCruiser.
Patrick C. Mackey
President ‑ Mercury Marine, Fond du Lac, WI USA

Table of Contents

Questions and Answers

  • J
    Justin JonesAug 4, 2025
    Why my MerCruiser 6.2 MPI Engine will not start?
    • M
      Melissa CopelandAug 5, 2025
      If your MerCruiser Engine won't start or is hard to start: * Check the lanyard stop switch. * Ensure you are following the correct starting procedure. * Verify there is sufficient fuel supply by filling the fuel tank or opening the valve. * Replace the fuel filter if it's clogged. * Drain and refill the fuel tank with fresh fuel if the current fuel is stale or contaminated. * Replace any kinked fuel lines or clear obstructions from the fuel line or tank vent line using compressed air. * Check the wire connections. * If these steps don't resolve the issue, it could be a faulty ignition system component or an EFI system fault, which may require professional service.
  • Z
    zsandovalAug 8, 2025
    What to do if MerCruiser Engine runs rough?
    • C
      Christine SmithAug 9, 2025
      If your MerCruiser Engine runs rough, misses, or backfires, consider these potential causes and solutions: * Replace the fuel filter if it is clogged. * If the fuel is stale or contaminated, drain the tank and fill it with fresh fuel. * Replace any kinked fuel lines or clear obstructions from the fuel or fuel tank vent line using compressed air. * Clean the flame arrestor. For issues related to low idle speed, a faulty ignition system component, or an EFI System fault, consult a qualified technician.
  • D
    Dr. Luis SalasAug 12, 2025
    How to improve poor performance of MerCruiser 6.2 MPI Engine?
    • J
      Joanne DiazAug 12, 2025
      If your MerCruiser Engine is showing poor performance, here are a few things to investigate: * Inspect the throttle cable and linkages to ensure the throttle is fully opening. * Consider replacing the propeller if it's damaged or improper. * Drain excessive bilge water and identify the cause of entry. * Reduce the load or redistribute it more evenly if the boat is overloaded or improperly loaded. * Clean the flame arrestor. * Clean or repair the boat bottom if it's fouled or damaged. If the issue persists, it may be related to ignition problems, engine overheating or EFI System fault, which may require professional service.
  • W
    watersnatalieAug 17, 2025
    What to do if the MerCruiser 6.2 MPI starter motor won't crank or cranks slowly?
    • P
      phelpslaurenAug 17, 2025
      If the MerCruiser Engine's starter motor won't crank the engine or cranks it slowly, here's what to check: * Ensure the battery switch is turned on. * Confirm the remote control is in the neutral position. * Inspect and reset any open circuit breakers, or replace blown fuses. * Examine all electrical connections and wires, especially battery cables; clean and tighten any loose or dirty connections. * Test the battery and charge it if necessary, replace it if it's bad. * Verify that the lanyard stop switch is not activated.
  • W
    walkerjorgeAug 22, 2025
    Why MerCruiser 6.2 MPI Engine does not recharge?
    • J
      Jeremy WashingtonAug 22, 2025
      If your MerCruiser Engine is not recharging, consider the following: * Turn off any non-essential accessories to reduce the current draw from the battery. * Replace or adjust the alternator drive belt if it is loose or in poor condition. * Test the battery and replace it if necessary. * Check all associated electrical connections and wires, especially battery cables, for looseness or dirtiness; clean and tighten faulty connections and repair or replace any damaged wiring. * Test the alternator output; replace the alternator if necessary.
  • B
    barbara86Aug 26, 2025
    Why is the MerCruiser Engine wheel difficult to turn?
    • S
      Sara ClaytonAug 27, 2025
      If the wheel of your MerCruiser is jerking or difficult to turn: * Check the power steering pump fluid level for leaks and refill the system with fluid if needed. * Replace or adjust the drive belt if it's loose or in poor condition. * Lubricate the steering components. For loose or missing steering fasteners or parts, or contaminated power steering fluid, consult a qualified technician.
  • A
    Albert FranklinAug 29, 2025
    Why MerCruiser 6.2 MPI remote control is difficult to move?
    • S
      Stephen JohnsonAug 30, 2025
      If the remote control for your MerCruiser Engine is difficult to move, has excessive play, or makes excessive sounds: * Lubricate the shift and throttle linkage fasteners. * Remove any obstruction in the shift or throttle linkages. For loose or missing shift and throttle linkages, or a kinked shift or throttle cable, consult a qualified technician.

Summary

Declaration of Conformance

Recreational Craft Directive Compliance

Ensures compliance with Recreational Craft Directive 94/25/EC and 2003/44/EC standards.

Electromagnetic Compatibility Compliance

Ensures compliance with Electromagnetic Compatibility Directive 89/336/EC and related standards.

Section 1 - Warranty Information

Mercury MerCruiser Limited Warranty

Details the limited warranty coverage for gasoline-fueled Mercury MerCruiser products.

3-Year Limited Warranty Against Corrosion

Covers product against inoperability due to corrosion for three years.

Section 2 - Getting to Know Your Power Package

Audio Warning System

Description of the audio warning system and its alert signals.

Engine Guardian Strategy

Explanation of the system designed to protect the engine from damage.

Transmission Guardian Strategy

Details the system that protects transmissions from clutch damage.

Section 3 - On The Water

Safe Boating Suggestions

General advice and recommendations for safe operation on the water.

Be Alert to Carbon Monoxide Poisoning

Information on carbon monoxide hazards and symptoms.

Starting and Stopping the Engine

Procedures for safely starting and stopping the marine engine.

Protecting People in the Water

Safety precautions when people are in the water near the boat.

Impact with Underwater Hazards

Getting Started

Section 5 - Maintenance

Owner;Operator Responsibilities

Maintenance Schedule-Inboard Models

Lists routine and scheduled maintenance tasks and intervals.

Engine Oil

Transmission Fluid

Section 6 - Storage

Cold Weather or Extended Storage

Preparing Power Package for Storage

Draining the Seawater System

Instructions for draining the seawater section of the cooling system.

Section 7 - Troubleshooting

Diagnosing EFI Problems

Engine Guardian System

Starter Motor Will Not Crank Engine, Or Cranks Slow

Common causes and remedies for starter motor issues.

Engine Will Not Start or Is Hard to Start

Troubleshooting steps for engines that won't start or start with difficulty.

Engine Runs Rough, Misses, or Backfires

Excessive Engine Temperature

Identifying causes and solutions for engine overheating.

Low Engine Oil Pressure

MerCruiser 6.2 MPI Specifications

General IconGeneral
Engine TypeV8
Alternator Output65 amp / 917 watt
Compression Ratio9.4:1
Displacement6.2L (377 cu in)
Horsepower300 hp
Fuel SystemMulti-Port Fuel Injection (MPI)
IgnitionDistributorless Ignition (DTS)
Fuel Type87 Octane Compatible
Max RPM5400 RPM
Bore x Stroke4.00 x 3.75 in / 101.6 x 95.25 mm

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