MTD 520 Series User Manual (English)

Questions and Answers:

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Lisa Rivera DVMJul 25, 2025
Why my MTD 520 engine fails to start?
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  David HernandezJul 26, 2025
  If your MTD Lawn Mower engine won't start, several factors could be at play. First, ensure the fuel tank isn't empty and that the fuel is fresh, not stale. If equipped, try pushing the primer bulb two or three times. Also, check that the spark plug wire is securely connected to the spark plug. A dirty air cleaner or a fouled spark plug could also be the culprit, so refer to the Engine Operator’s Manual for instructions. If the engine is flooded, consult the Engine Operator’s Manual.
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Mr. Andrew TorresJul 30, 2025
How to fix occasional skips at high speed on my MTD 520 Lawn Mower?
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  Brandon ClarkJul 30, 2025
  If your MTD Lawn Mower occasionally skips or hesitates at high speed, the spark plug gap may be too close. Adjust the gap, referring to the Engine Operator’s Manual for the correct gap specifications.
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Robert SmithAug 3, 2025
What to do if the drive-belt slips on my MTD 520 Lawn Mower?
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  Thomas MartinAug 3, 2025
  If the drive-belt slips on your MTD Lawn Mower, it is likely worn or stretched and needs to be replaced.
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Ashley CarpenterAug 7, 2025
Why my MTD 520 engine runs erratic?
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  Krista WilsonAug 7, 2025
  If your MTD Lawn Mower engine runs erratically, start by checking the spark plug wire to ensure it's connected and tight. Stale fuel can also cause this issue, so drain the old gasoline and refill the tank with fresh fuel. Additionally, a plugged vent in the gas cap could be the problem; clear it of any debris. Water or dirt in the fuel system can also lead to erratic running, so drain the fuel tank and refill with fresh fuel. For a dirty air cleaner, refer to the Engine Operator’s Manual.
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oroachAug 11, 2025
Why my MTD 520 Lawn Mower engine overheats?
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  Amy SimpsonAug 11, 2025
  If your MTD Lawn Mower engine overheats, first check the engine oil level and fill the crankcase with the proper oil if it's low. Ensure that the air flow around the engine isn't restricted by cleaning the area around and on top of the engine. For a dirty air cleaner, refer to the Engine Operator’s Manual.
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Thomas GreenAug 16, 2025
What to do if my MTD 520 idles poorly?
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  gmartinezAug 16, 2025
  If your MTD Lawn Mower idles poorly, the spark plug may be fouled, faulty, or have a gap that's too wide. Reset the gap or replace the spark plug. For a dirty air cleaner, refer to the Engine Operator’s Manual.
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Paul EdwardsAug 20, 2025
Why my MTD 520 has excessive vibration?
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  Rebecca DuncanAug 20, 2025
  If your MTD Lawn Mower experiences excessive vibration, it could be due to a bent or damaged edger blade, in which case you should replace it. Alternatively, the blade spindle might be bent or damaged, and you should contact an authorized service dealer.

MTD 520 Series Specifications

General

Starting System	Recoil
Mulch Capable	Yes
Side Discharge	Yes
Deck Material	Steel
Engine Type	4-Cycle
Cutting Width	51 cm
Wheel Size (Front)	200 mm
Wheel Size (Rear)	280 mm
Starter Type	Manual