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Small metal oil pump worm gear assembly for Stihl chainsaws

LAHDEK

LAHDEK Oil Pump Worm Gear Assembly fits Stihl 024 026 MS240 MS260 Replacement Part 1121 007 1043

SKU CH-AV6H-YGEGA

Oil pump worm gear assembly replaces OEM part 1121 007 1043 for Stihl 024 026 MS240 MS260 chainsaws

  • Restores automatic chain lubrication for reliable cutting performance
  • Direct replacement for OEM part numbers 1121 007 1043, 1121 640 7111, 1121 647 3100
  • Fits Stihl 024, 026, MS240 and MS260 petrol chainsaws
  • Complete assembly includes both oil pump and worm gear
  • New condition ensures full service life from installation

Chainsaw oil pump worm gear assembly

This replacement assembly fits Stihl 024, 026, MS240 and MS260 petrol chainsaws. It replaces OEM part numbers 1121 007 1043, 1121 640 7111 and 1121 647 3100. The kit includes one oil pump and one worm gear for a complete repair.

Two-stroke lubrication system constraints

The worm gear drives the oil pump directly from the engine crankshaft on these two-stroke models. Wear on the gear teeth or pump housing reduces oil delivery, risking bar and chain damage. This assembly restores the original mechanical link without electronic sensors or adjustable flow controls.

Capacity and service limits

The assembly handles standard cutting tasks for the listed saws, delivering factory-spec oil volume at operating RPM. It does not increase pump output beyond OEM design, so extremely long bars or high-speed milling may exceed its lubrication capacity. Installers should verify sprocket and drive-shaft condition before fitting.

Highlights

  • Restores automatic chain lubrication for reliable cutting performance
  • Direct replacement for OEM part numbers 1121 007 1043, 1121 640 7111, 1121 647 3100
  • Fits Stihl 024, 026, MS240 and MS260 petrol chainsaws
  • Complete assembly includes both oil pump and worm gear
  • New condition ensures full service life from installation

Specifications

No published specifications for this item yet.

Questions about this item

Does this oil pump worm gear assembly fit my Stihl MS260 chainsaw?

Yes, the assembly is listed as compatible with Stihl 024, 026, MS240 and MS260 models.

What happens to chain lubrication once this worm gear is installed in a worn pump housing?

The new worm gear meshes with the pump drive to restore positive oil delivery to the bar and chain.

How does the 1121 007 1043 part number relate to the other reference numbers shown?

It replaces OEM numbers 1121 007 1043, 1121 640 7111 and 1121 647 3100 for the same oil pump worm gear assembly.

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