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Form No. 3441-782 Rev A

21in Mulching/Rear Bagging Lawn
Mower

Model No. 17750—Serial No. 400000000 and Up

Model No. 17752—Serial No. 400000000 and Up

Model No. 17754—Serial No. 400000000 and Up

Operator's Manual

Register at

www.Lawn-Boy.com

.

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. Using this product for purposes
other than its intended use could prove dangerous to
you and bystanders.

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.

Visit www.Lawn-Boy.com for more information,
including safety tips, training materials, 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.

Important:

With your mobile device, you can

scan the QR code on the serial number decal (if
equipped) to access warranty, parts, and other
product information

g283232

Figure 1

1.

Model and serial number location

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.

g000502

Figure 2

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.

To avoid waste and help the environment, a
side-discharge chute does not come with your
purchase (most customers prefer to mulch or
bag their grass clippings). You can request a
side-discharge chute when you register your product
at www.Lawn-Boy.com. Simply check the box in the
online registration form and Lawn-Boy will send you a
side-discharge chute at no additional charge. Please
allow 1 to 2 weeks for delivery.

It is a violation of California Public Resource Code
Section 4442 or 4443 to use or operate the engine on
any forest-covered, brush-covered, or grass-covered
land unless the engine is equipped with a spark
arrester, as defined in Section 4442, maintained in
effective working order or the engine is constructed,
equipped, and maintained for the prevention of fire.

The enclosed engine owner's manual is supplied
for information regarding the US Environmental
Protection Agency (EPA) and the California Emission

© 2020—Lawn-Boy® Inc.
2101 Ashland Ave
Beatrice, NE 68310

Register at www.LawnBoy.com.

Original Instructions (EN)

Printed in Mexico

All Rights Reserved

*3441-782*

 

Summary of Contents for 17750

Page 1: ...Figure 1 1 Model and serial number location 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 t...

Page 2: ...lifornia to cause cancer birth defects or other reproductive harm Contents Introduction 1 Safety 3 General Safety 3 Safety and Instructional Decals 4 Setup 5 1 Unfolding the Handle 5 2 Installing the...

Page 3: ...s in place and functioning properly on the machine Keep bystanders and children out of the operating area Do not allow children to operate the machine Allow only people who are responsible trained fam...

Page 4: ...n object hazard keep bystanders away 3 Cutting dismemberment hazard of hand or foot mower blade disconnect the spark plug wire and read the Operator s Manual before performing maintenance 4 Cutting di...

Page 5: ...e Important To prevent accidental starting do not insert the key into the electric start ignition if equipped until you are ready to start the engine 1 Unfolding the Handle No Parts Required Procedure...

Page 6: ...the handle knobs and tighten them firmly by hand until they are completely tight against the handle 2 Installing the Recoil Starter Rope in the Rope Guide No Parts Required Procedure Important To star...

Page 7: ...ure Important If the oil level in the engine is too low or too high and you run the engine you may damage the engine g222533 Figure 6 4 Charging the Battery No Parts Required Procedure Electric Start...

Page 8: ...Figure 7 g027543 Figure 7 1 Handle 3 Grass bag 2 Frame Note Do not slip the bag over the handle Figure 7 2 Hook the bottom channel of the bag onto the bottom of the frame Figure 8 g027544 Figure 8 3...

Page 9: ...electric start model only 9 Oil fill dipstick 4 Battery electric start model only 10 Rear deflector 5 Fuel tank cap 11 Recoil start handle 6 Air filter g193246 Figure 10 1 Grass bag 2 Battery charger...

Page 10: ...d before filling not in a vehicle or on an object Fill the fuel tank outdoors in an open area when the engine is cold Wipe up any fuel that spills Do not handle fuel when smoking or around an open fla...

Page 11: ...king the Engine Oil Level Service Interval Before each use or daily Important If the oil level in the crankcase is too low or too high and you run the engine you may damage the engine g222533 Figure 1...

Page 12: ...can burn you Keep away from the hot muffler Adjust the cutting height as desired Set all wheels to the same cutting height Figure 13 g231461 Figure 13 During Operation During Operation Safety General...

Page 13: ...material against a wall or obstruction material may ricochet toward you Stop the blade s when crossing gravel surfaces Watch for holes ruts bumps rocks or other hidden objects Uneven terrain could ca...

Page 14: ...pull the recoil start handle pull it lightly until you feel resistance then pull it sharply Figure 16 Allow the rope to return to the handle slowly Note If the machine does not start after several at...

Page 15: ...ll a new Lawn Boy replacement bag WARNING The blade is sharp contacting the blade can result in serious personal injury Shut off the engine and wait for all moving parts to stop before leaving the ope...

Page 16: ...If there are more than 13 cm 5 inches of leaves on the lawn mow at a higher cutting height and then again at the desired cutting height Slow down your mowing speed if the machine does not cut the lea...

Page 17: ...r unfolding the handle If a cable is damaged contact an Authorized Service Dealer 1 Remove the electric start key if equipped 2 Loosen the handle knobs until you can move the handle freely Figure 20 g...

Page 18: ...ance procedure Wear gloves and eye protection when servicing the machine The blade is sharp contacting the blade can result in serious personal injury Wear gloves when servicing the blade Do not repai...

Page 19: ...lowing procedure Note Run the engine a few minutes before changing the oil to warm it Warm oil flows better and carries more contaminants Engine Oil Specifications Engine oil capacity 0 44 L 15 fl oz...

Page 20: ...lly then monthly every 25 starts or as needed Always use the charger in a sheltered area and charge the battery at room temperature 22 C or 70 F whenever possible 1 Connect the charger to the wire har...

Page 21: ...g338674 Figure 26 1 Battery cover 3 Foam 2 Fuse holder 4 Battery 2 Replace the fuse in the fuse holder Figure 27 g002878 Figure 27 3 Install the battery cover 21...

Page 22: ...d or replace it WARNING The blade is sharp contacting the blade can result in serious personal injury Wear gloves when servicing the blade 1 Refer to Preparing for Maintenance page 18 2 Tip the machin...

Page 23: ...ine for Storage 1 On the last refueling of the year add fuel stabilizer to the fuel as directed by the engine manufacturer 2 Dispose of any unused fuel properly Recycle it according to local codes or...

Page 24: ...ly by pulling the recoil start handle to blow the excess oil from the cylinder 4 Install the spark plug and tighten it with a torque wrench to 20 N m 15 ft lb 5 Perform any maintenance procedures refe...

Page 25: ...Notes...

Page 26: ...Notes...

Page 27: ...ts grocery stores hotels schools and hospitals and on a wide variety of products Additionally some online and mail order retailers provide Prop 65 warnings on their websites or in catalogs How do the...

Page 28: ......

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