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O.S. - OSMG8172 OSM26711305 26711305 531028114241 4531028114241
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O.S. Ratchet Spring #7H/#7D/#2K
O.S. Ratchet Spring #7H/#7D/#2K
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Mid Dec

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Tech Notes
This is the ratchet spring that fits many OS Engine Needle Valve Assemblies.
It is used to hold the needle valve in place after adjustment.


Metal Construction
Black in color


One Ratchet Spring


None, item is a stock part


Overall Length: 15.9mm (.625")
Spring Length: 10mm (.5")
Mounting Diameter: 6mm (.24")


This Ratchet Spring fits the needle valves on the following engines:
-LA Series
-FX Series
-SX Series
-61 RX
-LX Series
-FS52 thru FS120 Surpass Four Stroke Series
-FT Multi-Cylinder Four Stroke Series
-FF Multi-Cylinder Four Stroke Series
-FR Multi-Cylinder Four Stroke Series

NNA 12/19/01

– If you need more information, use these O.S. resources –
Email: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970
  Postal Address:

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