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Predator Engines 212 - User Manual

Predator Engines 212
30 pages
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212, 346 and 420 cc
Horizontal Engines
68120/68121 212cc Horizontal Engine
68136 346cc Horizontal Engine
68306 420cc Horizontal Engine
Using an engine indoors CAN KILL YOU
IN MINUTES.
Engine exhaust contains carbon monoxide.
This is a poison you cannot see or smell.
NEVER use inside
a home or garage,
EVEN IF doors and
windows are open.
Only use OUTSIDE
and far away from
windows, doors,
and vents.
When unpacking, make sure that the product is intact and undamaged.
If any parts are missing or broken, please call 1-800-520-0882 as soon as possible.
Record Product’s Serial Number Here:
(See Serial Number Location on page 6.)
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not available individually
as replacement parts.
Visit our website at: http://www.harborfreight.com
Email our engine tech support at: predator@harborfreight.com
Copyright
©
2010 by Harbor Freight Tools
®
. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape
or form without the express written consent of Harbor Freight Tools. Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein. Tools required for assembly and service may not be included.
Manual Revised 11f

Table of Contents

Questions and Answers

  • B
    Brandi BurchAug 5, 2025
    What to do if my Predator Engines 212 Engine stops suddenly?
    • C
      Catherine RangelAug 5, 2025
      If your Predator Engines Engine stops suddenly, consider these possible causes: * Check the engine oil level and fill to the proper level if it's low. Remember to check the oil before each use. * Ensure the fuel tank is not empty and is filled with fresh 87+ octane unleaded gasoline, avoiding gasoline with more than 10% ethanol. * The fuel tank cap could be defective, creating a vacuum. Test or replace the cap. * Check if the spark plug cap is disconnected or improperly connected and secure it. * For a faulty magneto, it is recommended to have a qualified technician service it.
  • M
    Mason HernandezAug 10, 2025
    Why is my Predator Engines 212 misfiring?
    • C
      Christopher WatsonAug 10, 2025
      If your Predator Engines Engine is misfiring, it could be due to several reasons: * Check the spark plug cap to ensure it's not loose and the wire connections are secure. * Inspect the spark plug for incorrect gap or damage; re-gap or replace it as needed. * A defective spark plug cap can also cause misfires, so consider replacing it. * Old or low-quality gasoline can be a culprit; use only fresh 87+ octane unleaded gasoline, and avoid gasoline with more than 10% ethanol. * Incorrect compression may be the cause. Diagnose and repair compression. (Refer to the Engine will not start: COMPRESSION RELATED section.)
  • N
    nichole69Aug 15, 2025
    What causes a Predator Engines 212 to knock?
    • M
      mendezlisaAug 15, 2025
      If your Predator Engines Engine is knocking, it may be due to: * Using old or low-quality gasoline. Replace it with fresh 87+ octane unleaded gasoline, and avoid gasoline with more than 10% ethanol. * The engine may be overloaded. Avoid exceeding the equipment’s load rating. * Incorrect spark timing, deposit buildup, a worn engine, or other mechanical problems. Have a qualified technician diagnose and service the engine.
  • M
    Mrs. Sarah BoydAug 20, 2025
    Why does my Predator Engines 212 Engine stop under heavy load?
    • M
      Mrs. Elizabeth Wright MDAug 20, 2025
      If your Predator Engines Engine stops when under a heavy load, it could be due to: * A dirty air filter. Clean or replace the filter element. * The engine running cold. Allow the engine to warm up before operating the equipment.
  • O
    oscarthompsonAug 25, 2025
    How to prevent a Predator Engines Engine from backfiring?
    • M
      Mark DavidsonAug 26, 2025
      To prevent your Predator Engines Engine from backfiring, consider the following: * Use fresh 87+ octane unleaded gasoline, avoiding gasoline with more than 10% ethanol, as impure or low-quality gasoline can cause backfiring. * If the engine is too cold, use cold weather fuel and oil additives. * For a stuck intake valve or overheated engine, have a qualified technician diagnose and service the engine. * Also, check the engine timing.
  • D
    Debra WardOct 30, 2025
    How to start a Predator Engines 212 Engine that won't start?
    • L
      leachbrittanyOct 30, 2025
      If your Predator Engines Engine won't start, there are several fuel-related issues to check: * Make sure there is fuel in the tank and the fuel valve is open. If not, fill the tank and open the valve. * If the engine is cold, ensure the choke is in the CHOKE position. * Avoid gasoline with more than 10% ethanol. Clean out any ethanol-rich gasoline, replace any damaged components, and use fresh 87+ octane unleaded gasoline. * If the gasoline is old or of low quality, replace it with fresh 87+ octane unleaded gasoline. * Try pulling the starter handle to prime the carburetor. * If fuel passageways are dirty, clean them with a fuel additive. Heavy deposits may need further cleaning. * If you smell fuel, the carburetor needle might be stuck. Gently tap the side of the carburetor...

Summary

Specifications

Safety Warnings

Setup Precautions

Operating Precautions

Service Precautions

Refueling

Engine Controls

Set Up

Battery Setup Instructions

Operation

Checking and Filling Fuel

Checking and Filling Engine Oil

Manual Start

Stopping the Engine

Electric Start (if equipped)

Service

Cleaning, Maintenance, and Lubrication Schedule

Engine Oil Change

Air Filter Element Maintenance

Spark Plug Maintenance

Storage

Troubleshooting

Predator Engines 212 Specifications

General IconGeneral
Displacement212cc
Bore x Stroke70mm x 55mm
Compression Ratio8.5:1
Maximum Output6.5 HP @ 3600 RPM
Shaft OrientationHorizontal
Max Torque2500 RPM
Fuel TypeGasoline
Shaft Diameter0.75 inches
Starting SystemRecoil
Oil Capacity0.6 liters

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