MTD Yard Machines LT31CS

Questions and Answers

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Megan WrightJul 29, 2025
How to fix MTD Yard Machines LT31CS if engine will not start?
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  Eric ScottJul 29, 2025
  If your MTD Trimmer engine won't start, there are several possible reasons: * The On/Off control might be in the OFF position. Turn it to ON. * The fuel tank may be empty. Refill it with properly mixed fuel. * The primer bulb may not have been pressed enough. Press it fully and slowly 10 times. * The engine could be flooded. Squeeze the trigger and pull the starter rope. * The fuel may be old or improperly mixed. Drain the tank and add fresh fuel. * The spark plug might be fouled. Replace or clean it. * The spark arrestor could be plugged. Clean or replace it. * If the outside temperature is below 40º F, pull the starter rope up to 10-15 times. * If the outside temperature is above 90º F, squeeze the throttle control and pull the starter rope.
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Brenda AtkinsonAug 3, 2025
What to do if cutting attachment will not advance on MTD Yard Machines LT31CS?
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  Timothy SchmidtAug 3, 2025
  If the cutting attachment on your MTD Trimmer will not advance, consider the following: * The cutting attachment may be bound with grass. Stop the engine and clean the cutting attachment. * The cutting attachment might be out of line. Refill with new line. * The inner reel could be bound up. Replace the inner reel. * The cutting head could be dirty. Clean the inner reel and outer spool. * The line might be welded. Disassemble, remove the welded section, and rewind. * The line could be twisted when refilled. Disassemble and rewind the line. * Not enough line may be exposed. Push the bump knob and pull out line until 102 mm (4 inches) of line is outside of the cutting attachment.
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Kimberly GibsonAug 8, 2025
Why does my MTD Trimmer engine lack power or stall when cutting?
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  James JordanAug 8, 2025
  If your MTD Trimmer engine lacks power or stalls while cutting, consider these potential causes: * Old or improperly mixed fuel might be the issue. Drain the fuel tank and add a fresh fuel mixture. * The carburetor may need adjustment. Take the trimmer to an authorized service dealer for adjustment. * A fouled spark plug can cause this problem. Replace or clean the spark plug. * A plugged spark arrestor could be the culprit. Clean or replace the spark arrestor.
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Angel HarrellAug 14, 2025
What to do if MTD Trimmer engine will not accelerate?
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  Richard ColemanAug 14, 2025
  If your MTD Trimmer engine will not accelerate, it could be due to several reasons: * Old or improperly mixed fuel. Drain the fuel tank and add a fresh fuel mixture. * Improper carburetor adjustment. You should take it to an authorized service dealer for an adjustment. * The cutting attachment might be bound with grass. Stop the engine and clean the cutting attachment. * A dirty air filter. Clean or replace the air filter. * A plugged spark arrestor. Clean or replace the spark arrestor.
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Tammy LloydAug 19, 2025
Why MTD Yard Machines LT31CS engine will not idle?
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  Daniel AguilarAug 19, 2025
  If your MTD Trimmer engine won't idle, check these potential issues: * The air filter might be plugged. Replace or clean it. * Old or improperly mixed fuel could be the cause. Drain the fuel tank and add fresh fuel mixture. * The carburetor may need adjustment. Adjust it according to the Carburetor Adjustments section.
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scott62Aug 23, 2025
Why cutting line advances uncontrollably on my MTD Yard Machines LT31CS Trimmer?
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  Tracy BrownAug 23, 2025
  If the cutting line on your MTD Trimmer advances uncontrollably, it is likely due to oil, cleaner, or lubricant being present in the cutting head. To resolve this, clean and thoroughly dry the cutting head.