Craftsman 917.370721 User Manual

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Owner's Manual

CRAFTSMAN°

ROTARY

6.75 Horsepower

Power-Propelled

21" Multi-Cut

Model No.

917.370721

• Espa_ol, p. 20

CAUTION'.

Read and follow all

Safety Rules and instructions

before operating this equipment

Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.

Visit our Craftsman website:www.sears.com/craftsman

Table of Contents

Questions and Answers:

K
krausethomasJul 29, 2025
Why does my Craftsman Lawn Mower lose power?
- A
  Anna SchneiderJul 29, 2025
  If your Craftsman Lawn Mower loses power, several factors could be at play. It might be due to the rear of the mower housing or the blade dragging in heavy grass, or you might be cutting too much grass at once. A dirty air filter, a buildup of grass under the mower, too much oil in the engine, or walking too fast could also be the culprits. To address these, try raising the cutting height, cleaning or replacing the air filter, cleaning the underside of the mower housing, checking the oil level, and cutting at a slower pace.
A
Ashley PerryAug 3, 2025
How to fix poor and uneven cut with my Craftsman 917.370721 Lawn Mower?
- G
  greenjeremyAug 3, 2025
  If your Craftsman Lawn Mower is producing an uneven cut, the issue might stem from a worn, bent, or loose blade, uneven wheel heights, or a buildup of grass and debris under the mower. You can fix this by replacing the blade, tightening the blade bolt, setting all wheels at the same height, and cleaning the underside of the mower housing.
M
mcintyreericaAug 7, 2025
Why is the starter rope hard to pull on my Craftsman 917.370721 Lawn Mower?
- K
  Katherine OchoaAug 7, 2025
  If your Craftsman Lawn Mower's starter rope is hard to pull, it could be due to a few reasons. The engine flywheel brake might be engaged when the control bar is released, the engine crankshaft might be bent, the blade adapter could be broken, or the blade might be dragging in the grass. Try depressing the control bar to the upper handle before pulling the starter rope, replacing the blade adapter, and moving the lawn mower to cut grass or to a hard surface.
B
baliAug 10, 2025
Why is my Craftsman Lawn Mower so hard to push?
- K
  kdominguezAug 11, 2025
  If your Craftsman Lawn Mower is hard to push, it could be due to several reasons. The grass might be too high, or the wheel height might be too low. Also, the rear of the mower housing or the cutting blade could be dragging in the grass. A full grass catcher or an improperly adjusted handle height can also make it difficult to push. Try raising the cutting height, adjusting the rear of the mower housing one setting higher, emptying the grass catcher, and adjusting the handle height to a comfortable position.
B
Brianna FieldsAug 15, 2025
What to do if the grass catcher is not filling on my Craftsman 917.370721 Lawn Mower?
- H
  howelljenniferAug 15, 2025
  If the grass catcher on your Craftsman Lawn Mower isn't filling up as expected, it could be because the cutting height is too low, the blade's lift is worn off, or the catcher isn't venting air properly. To resolve this, try raising the cutting height, replacing the blade, and cleaning the grass catcher.
K
Kristina YorkAug 25, 2025
Why is my Craftsman 917.370721 Lawn Mower vibrating so much?
- D
  douglastiffanyAug 25, 2025
  If your Craftsman Lawn Mower is vibrating excessively, it could be due to a worn, bent, or loose blade. Replacing the blade and tightening the blade bolt may solve this issue.
J
Joshua JohnsonSep 10, 2025
What causes loss of drive speed on a Craftsman Lawn Mower?

Craftsman 917.370721 Specifications

General

Brand	Craftsman
Model	917.370721
Category	Lawn Mower
Language	English

Summary

Craftsman Rotary Lawn Mower Owner's Manual

Important Safety Instructions

Read and follow all safety rules and instructions before operating this equipment.

Warranty and Safety Guidelines

Limited 2-Year Warranty

Details the warranty coverage and exclusions for the power mower.

General Safety Rules

Crucial safety precautions including warnings for injury and hazards.

Operation and Setup Procedures

General Operation and Safe Handling

Covers safe operating practices, slope operation, child safety, and gasoline handling.

Assembly and Initial Setup

Instructions for unpacking the mower and assembling the handle assembly.

Using Mower Controls and Adjustments

Explanation of mower controls, symbols, and adjustments like cutting height and drive control.

Mower Conversion and Grass Management

Guides on switching between mulching, bagging, and side-discharging modes.

Engine Preparation and Starting

Procedures for checking oil, adding fuel, and starting/stopping the engine.

Mowing Techniques

Tips for efficient mowing, including mulching strategies and cutting patterns.

Maintenance, Storage, and Troubleshooting

Maintenance Schedule and Lubrication

A detailed chart outlining maintenance tasks and lubrication points.

Component Maintenance

Instructions for maintaining tires, wheels, blades, and other mower parts.

Engine Maintenance

Procedures for engine oil, air filter, muffler, and spark plug service.

Cleaning, Adjustments, and Storage

Guidelines for cleaning the mower, performing adjustments, and preparing for storage.

Troubleshooting Common Issues

Diagnoses and solutions for engine starting problems, loss of power, and other performance issues.

Parts and Service Information

Repair Parts Identification

Exploded view diagrams for identifying mower components.

Mower and Engine Parts Lists

Comprehensive lists of part numbers for mower and engine components.

Service Notes and Customer Support

Information for recording service notes and contacting customer support for repairs.

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