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Craftsman 247.370310 - User Manual

Craftsman 247.370310
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Operator's Manual
CRRFr MRN
21" LAWN MOWER
Model No. 247.370310
CAUTION" Before using this
product, read this manual and
follow all safety rules and operating
instructions.
,, SAFETY
o ASSEMBLY
OPERATION
MAINTENANCE
PARTS LIST
o ESPANOL
Sears Brands Management Corporation, Hoffman Estates, IL 60179, U.S.A.
Visit our website: www.craftsman.com FormI/o 769-07574A
(October1,2012)

Table of Contents

Questions and Answers

  • M
    Michael GrayJul 26, 2025
    Why my Craftsman Lawn Mower engine fails to start?
    • D
      Dr. Lori CruzJul 26, 2025
      If your Craftsman Lawn Mower engine won't start, here are a few things to check: * Make sure the blade control is engaged. * Ensure the spark plug boot is connected. * Verify the fuel tank isn't empty and the fuel is fresh. * If equipped, prime the engine as instructed. * Inspect the spark plug; clean, adjust the gap, or replace if needed. * If the engine is flooded, wait a few minutes before restarting. * If the fuel line is blocked, it needs professional cleaning.
  • G
    George GillespieJul 30, 2025
    Why does my Craftsman 247.370310 engine run erratic?
    • K
      Kathryn ClarkJul 30, 2025
      If your Craftsman Lawn Mower engine runs erratically, consider these potential causes: * Check the spark plug boot and ensure it's connected and tight. * Old fuel can cause issues; replace it with fresh gasoline. * A plugged vent in the gas cap can be the culprit; clear the vent. * Water or dirt in the fuel system could be the problem; run the engine until it stops, then refill with fresh fuel.
  • W
    William CamposAug 3, 2025
    How to fix uneven cut with my Craftsman 247.370310?
    • J
      James CabreraAug 4, 2025
      If your Craftsman Lawn Mower is giving an uneven cut, here’s what to check: * Make sure the wheels are at the same height. Adjust the cutting height lever on the front right and rear right wheels to the same position. * A dull blade can also cause an uneven cut. Sharpen or replace the blade.
  • J
    Jeanne LawrenceAug 7, 2025
    What to do if my Craftsman 247.370310 idles poorly?
    • N
      Nichole JohnsonAug 7, 2025
      If your Craftsman Lawn Mower idles poorly, try this: * Check the spark plug. Reset the gap or replace the spark plug if it's fouled, faulty, or the gap is too wide.
  • T
    Timothy VazquezAug 11, 2025
    What to do if my Craftsman 247.370310 Lawn Mower will not mulch grass?
    • A
      Andrea TorresAug 12, 2025
      If your Craftsman Lawn Mower is not mulching grass, here are some possible reasons: * Wet grass can prevent proper mulching; wait until it's dry. * If the grass is too high, mow at a higher setting first, then at the desired height, or reduce the cutting path width. * A dull blade won't mulch effectively; sharpen or replace it.
  • S
    Seth WalkerAug 16, 2025
    Why is my Craftsman Lawn Mower engine overheating?
    • C
      Chad LamAug 17, 2025
      If your Craftsman Lawn Mower engine is overheating, check these items: * Ensure the engine oil level is adequate and fill the crankcase with the correct oil if it's low. * Make sure that the area around the engine is clean and there are no obstructions to airflow.
  • L
    Laurie NormanAug 20, 2025
    Why does my Craftsman 247.370310 have excessive vibration?
    • M
      Margaret CoxAug 20, 2025
      If your Craftsman Lawn Mower has excessive vibration, check these: * Ensure the cutting blade is tight and balanced. Tighten the blade and adapter, and balance the blade. * A bent cutting blade can cause vibration. Replace the blade.

Summary

Safety Instructions

Assembly

Attaching The Handle

Step-by-step guide for attaching the mower handle assembly.

Attaching The Grass Catcher

Cutting Height Adjustment

Operation

Blade Control

Explanation of the blade control lever function and safety.

Filling Gas and Oil

Procedures for filling the engine with gasoline and oil before operation.

Starting the Engine

Step-by-step instructions on how to safely start the mower's engine.

Stopping the Engine

How to safely stop the mower's engine and blade.

Service and Maintenance

Maintenance Schedule

A schedule outlining required maintenance tasks at different intervals.

Engine Maintenance

Spark Plug Maintenance

How to check, clean, gap, and replace the spark plug.

Air Cleaner Maintenance

How to inspect, clean, or replace the air cleaner filter.

Off-Season Storage

Preparing The Engine for Storage

Troubleshooting

Common Mower Problems and Solutions

A guide to diagnosing and resolving common issues with the lawn mower.

Craftsman 247.370310 Specifications

General IconGeneral
BrandCraftsman
Model247.370310
CategoryLawn Mower
Engine Displacement140cc
Cutting Positions6
Deck MaterialSteel
Mulching CapabilityYes
Side DischargeYes
Starter TypeRecoil
Engine TypeGasoline
Cutting Width21 inches
Cutting Height1.25-3.75 inches
Wheel Size8 in. (front), 11 in. (rear)
Warranty2 years limited

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