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Introduction

This rotary-blade, walk-behind lawn mower is intended
to be used by residential homeowners. It is designed
primarily for cutting grass on well-maintained lawns
on residential properties. It is not designed for cutting
brush or for agricultural uses.
Read this information carefully to learn how to operate and
maintain your product properly and to avoid injury and
product damage. You are responsible for operating the
product properly and safely.
You may contact Lawn-Boy directly at www.Lawn-Boy.com
for product and accessory information, help finding a dealer,
or to register your product.
Whenever you need service, genuine Lawn-Boy parts, or
additional information, contact an Authorized Service Dealer
or Lawn-Boy Customer Service and have the model and
serial numbers of your product ready. Figure 1 identifies the
location of the model and serial numbers on the product.
Write the numbers in the space provided.
1. Model and serial number plate
© 2013—Lawn-Boy® Inc.
8111 Lyndale Avenue South
Bloomington, MN 55420
21in Mulching/Rear Bagging Lawn
Mower
Model No. 10730—Serial No. 314000001 and Up
Model No. 10732—Serial No. 314000001 and Up
Model No. 10734—Serial No. 314000001 and Up
Model No. 17730—Serial No. 314000001 and Up
Model No. 17732—Serial No. 314000001 and Up
Model No. 17734—Serial No. 314000001 and Up
Receive a free side-discharge chute by
completing the Discharge Chute Order
Form when you register your product at
www.Lawn-Boy.com! Please allow four to five
weeks for delivery.
1
g024069
Figure 1
Register at www.LawnBoy.com.
Model No.
Serial No.
This manual identifies potential hazards and has safety
messages identified by the safety alert symbol (Figure 2),
which signals a hazard that may cause serious injury or death
if you do not follow the recommended precautions.
1. Safety alert symbol
This manual uses 2 words to highlight information.
Important calls attention to special mechanical information
and Note emphasizes general information worthy of special
attention.
Original Instructions (EN)
All Rights Reserved *3379-226* A
Printed in the USA
Form No. 3379-226 Rev A
Operator's Manual
Figure 2

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Summarization of Contents

Introduction
Product Identification
Locating model and serial numbers on the mower.
Safety Alert Symbol
Explains the meaning of the hazard symbol used in the manual.
Key Information Indicators
Describes emphasis words like 'Important' and 'Note'.
California Proposition 65 Warning
Net Torque
Specifies the engine's torque rating.
Safety
General Operation Safety
Essential safety practices for operating the mower.
Slope Operation Safety
Specific precautions for mowing on inclines.
Children Safety
Guidelines to protect children during operation.
Service Safety
Safety measures before performing maintenance.
Safety and Instructional Decals
Identifies and explains safety labels on the mower.
Safe Handling of Gasoline
Precautions and procedures for safe refueling and storage.
General Service
Hauling Safety
Guidelines for safely transporting the mower.
California Spark Arrester Warning
Safety Decal Icons
Explains the meaning of various safety symbols used on the mower.
Setup
Unfolding the Handle
Instructions for preparing the mower's handle.
Installing Recoil-Starter Rope
Guide to fitting the starter rope correctly.
Filling Engine with Oil
Essential step before the first engine start.
Product Overview
Charging the Battery
Procedure for charging the battery on electric-start models.
Operation
Attachments and Accessories
Information on optional equipment.
Filling the Fuel Tank
Safe and correct method for fueling the mower.
Checking Engine-Oil Level
Daily procedure to ensure proper oil level.
Adjusting the Cutting Height
Starting the Engine
Step-by-step guide to start the mower's engine.
Using the Self-Propel Drive
Stopping the Engine
How to safely shut down the mower.
Mulching Clippings
Instructions for mulching grass.
Bagging Clippings
Instructions for collecting grass clippings.
Installing the Grass Bag
Guide to attaching the grass bag.
Operating Tips
General Mowing Tips
Advice for efficient and safe mowing.
Cutting Grass Techniques
Methods for optimal grass cutting results.
Maintenance
Recommended Maintenance Schedule
A table outlining required upkeep tasks and intervals.
Preparing for Maintenance
Safety precautions before performing any service.
Servicing the Air Cleaner
Changing the Engine Oil
Procedure to drain and refill engine oil.
Charging the Battery
Replacing the Fuse
How to replace a blown fuse for electric-start models.
Storage
Preparing Machine for Storage
Steps to ready the mower for long-term storage.
Folding the Handle
Instructions for collapsing the handle for storage.
Removing Machine from Storage
Steps to prepare the mower after storage.
Lawn-Boy Warranty Information
Covered Products and Conditions
Details on what the warranty covers.
Exclusions and Not Covered Items
List of items not covered by warranty.
Commercial Use Warranty
Warranty terms for commercial applications.
Obtaining Warranty Service
How to get warranty repairs.
Owner's Responsibilities
User's duties regarding maintenance and care.
General Warranty Conditions
Standard terms applicable to all warranties.
International Warranty Information
Guidance for customers outside the US/Canada.

Table of Contents

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