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Greyhound 66524-11 HP - User Manual

Greyhound 66524-11 HP
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OHV GAS ENGINE - HORIZONTAL
Model
66524-11 HP
66525-13 HP
ASSEMBLY AND OPERATION INSTRUCTIONS
IMPORTANT!
Your Warranty is voided if:
You do not put Engine oil in
the Engine’s crankcase prior
     
the Engine with low or no

low or no oil will permanently

Visit our website at: http://www.harborfreight.com
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright
©
2008 by Harbor Freight Tools
®

contained herein may be reproduced in any shape or form without the express written consent of Harbor


For technical questions or replacement parts, please call 1-800-444-3353.


Questions and Answers

  • B
    Bradley RobinsonJul 31, 2025
    Why won't my Greyhound 66524-11 HP start?
    • S
      Sean TerryJul 31, 2025
      There are several reasons why your Greyhound Engine might not start. It could be due to low fuel or oil (add fuel or oil). The ignition switch might be in the “OFF” position (turn it to “ON”). A faulty spark plug (clean or replace it), incorrect choke position (properly adjust choke), or the fuel lever being in the “CLOSED” position (turn it to “OPEN”) could also be the cause. Furthermore, the engine might be under load (remove the load), the spark plug wire might be loose (attach the wire), the fuel line or air filter could be clogged (clean them), the fuel may be contaminated (drain and refill with fresh fuel), there might be a faulty ignition system (have a technician check it), or the battery could be low or defective (recharge or replace it).
  • D
    david53Aug 10, 2025
    What to do if my Greyhound 66524-11 HP Engine will not start?
    • J
      Jessica BarnesAug 10, 2025
      If your Greyhound Engine won't start, here's what you can check: * Ensure there's enough fuel and oil; add if needed. * Verify the ignition switch is in the “ON” position. * Inspect the spark plug; clean or replace if faulty. * Adjust the choke to the correct position. * Confirm the fuel lever is in the “OPEN” position. * Remove any load from the engine during startup. * Check the spark plug wire and attach if loose. * Clean the fuel line and air filter if clogged. * Drain and refill the fuel tank with fresh fuel if contaminated. * Recharge or replace the battery if low or defective. If none of these steps work, have a qualified technician check the ignition system.
  • R
    Robert LawsonAug 20, 2025
    How to fix a Greyhound Engine that won't start?
    • L
      lauren48Aug 20, 2025
      To fix a Greyhound Engine that won't start, begin by checking the fuel and oil levels and adding more if they are low. Ensure the ignition switch is in the 'ON' position. Inspect the spark plug for faults and clean or replace it if necessary. Adjust the choke to the correct position and make sure the fuel lever is in the 'OPEN' position. Remove any load from the engine during startup. Check that the spark plug wire is securely attached. Clean the fuel line and air filter if they are clogged. If the fuel is contaminated, drain the tank and refill it with fresh fuel. Recharge or replace the battery if it's low or defective. If the problem persists, have a qualified technician examine the ignition system.

Summary

Important Initial Warnings

Engine Specifications

General Safety and Operation Guidelines

General Safety Rules

Instructions to prevent fire, serious injury, and death.

Safe Work Area and Personal Safety

Maintaining a clean work area and personal protection measures.

Tool Use and Care Best Practices

Proper engine selection and maintenance for optimal performance.

Engine Service and Specific Safety Rules

Engine Service Requirements

Engine maintenance must be performed by qualified technicians.

Specific Safety Rules

Crucial safety points including warranty, labels, and workspace.

Toxic Fumes, Fire, and Explosion Precautions

Mechanical Precautions

Chemical, Noise, and Miscellaneous Precautions

Assembly Instructions

Engine Mounting Procedure

Steps to securely mount the engine to a power equipment unit.

Engine Mounting Diagram

Battery Connection and Pre-Operation

Connecting Battery to Starter Motor

Correctly connecting battery terminals to the starter motor.

Pre-Operating Instructions

Essential steps including filling oil and fuel before starting.

Operating Instructions

Starting the Engine

Procedures for starting using battery or recoil starter.

Engine Operation and Shutdown

Proper running procedures and safe engine shutdown methods.

Inspection, Maintenance, and Cleaning Schedule

Troubleshooting Common Problems

Parts List;Diagram - Crankcase

Parts List;Diagram - Crankcase Cover

Parts List;Diagram - Cylinder Head;Cover

Parts List;Diagram - Crankshaft, Piston, Connecting Rod

Parts List;Diagram - Camshaft, Valve Rocker

Parts List;Diagram - Carburetor

Parts List;Diagram - Fuel Tank

Parts List;Diagram - Air Cleaner

Parts List;Diagram - Muffler

Parts List;Diagram - Recoil Starter

Parts List;Diagram - Regulating Control System

Parts List;Diagram - Flywheel

Parts List;Diagram - Ignition Coil

Parts List;Diagram - Starter Motor

Parts List;Diagram - Starter & Control Box

Wiring Diagram

Important Read Carefully Disclaimer

Emission Control System Warranty

Manufacturer Warranty Coverage

Warranty period and defect coverage for emission parts.

Harbor Freight Emission Control Warranty Provisions

Length of coverage and warranty terms for retail purchasers.

Limited 90 Day Warranty

Greyhound 66524-11 HP Specifications

General IconGeneral
BrandGreyhound
Model66524-11 HP
CategoryEngine
LanguageEnglish

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