Makita PLM4622 - User Manual

Questions and Answers

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Katrina LongAug 4, 2025
Why Makita Lawn Mower engine does not start?
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  Rodney CampbellAug 4, 2025
  The engine may fail to start due to several reasons. The throttle chock might not be in the correct position, so adjust it accordingly. The fuel tank could be empty, requiring you to fill it. A dirty air cleaner element can also prevent starting, so clean it. Check if the spark plug is loose and tighten it to 25 - 30 Nm if needed. Ensure the spark plug wire is properly connected. An incorrect spark plug gap (it should be between 0.7 to 0.8 mm) or a defective spark plug could also be the cause, as well as carburetor flooded with fuel. In the latter case, remove the air cleaner element and pull the starter rope until the carburetor clears itself, then reinstall the air cleaner element. If none of these work, there may be a faulty ignition module.
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jacobestradaAug 8, 2025
What to do if Makita Lawn Mower engine is difficult to start or loses power?
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  wilsonbrendaAug 8, 2025
  If your Makita Lawn Mower engine is hard to start or loses power, the issue might stem from dirt, water, or stale fuel in the tank; in this case, drain the fuel and clean the tank, then fill it with clean, fresh fuel. Another potential cause is a plugged vent hole in the fuel tank cap, which you should clean or replace. A dirty air cleaner element can also cause these problems, so make sure to clean it.
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Robert Steele MDAug 12, 2025
What to do if Makita Lawn Mower engine overheats?
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  Vincent RossAug 12, 2025
  If your Makita Lawn Mower engine overheats, it could be due to restricted cooling air flow. Remove any debris from the slots in the shroud, blower housing, and air passages. Another cause might be an incorrect spark plug. Install an RJ19LMC spark plug and ensure the cooling fins are on the engine.
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Johnny WoodsAug 16, 2025
Why Makita PLM4622 Lawn Mower engine operates erratically?
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  Carrie WaltonAug 17, 2025
  An erratic engine operation in your Makita Lawn Mower can be caused by a defective spark plug, so install a new, correctly gapped plug. Another potential reason is an incorrect spark plug gap, which should be set between 0.7 and 0.8 mm. Also, a dirty air cleaner element may be the cause.
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shelley81Aug 21, 2025
What to do if Makita PLM4622 Lawn Mower vibrates abnormally?
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  Anthony AdkinsAug 21, 2025
  Abnormal vibration in your Makita Lawn Mower can be caused by a loose cutting assembly, so tighten the blade. Alternatively, the cutting assembly might be unbalanced, so balance the blade.
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Brett DuffyAug 26, 2025
Why Makita PLM4622 engine idles poorly?
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  ihinesAug 26, 2025
  Poor idling in your Makita Lawn Mower engine may occur if the air cleaner element is dirty. Also, check if the air slots in the engine shroud are blocked and remove any debris. Cooling fins and air passages under the engine blower housing may also be blocked; remove any debris from these areas as well.
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Daniel JohnsonAug 29, 2025
Why Makita PLM4622 Lawn Mower engine skips at high speed?
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  npalmerAug 30, 2025
  If your Makita Lawn Mower engine skips at high speed, it might be because the gap between the electrodes of the spark plug is too close. Set the gap between the electrodes to 0.7 to 0.8 mm.