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O.S. - OSMG4072 OSM22557100 22557100 531028129436 4531028129436
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O.S. Cover Plate 25LA
O.S. Cover Plate 25LA
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Parts Saver Eligible:Yes

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Early Mar

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Tech Notes
This is the Cover Plate with Needle Valve Holder for the O.S. Max .25LA
and the .25LA-S Airplane Engines.
This Cover Plate also known as a Back Plate fastens to the
rear of the Crankcase to seal the engine, hold the Needle Valve Assembly,
and allow access to the Crankshaft and Connecting Rod.


Constructed of molded black plastic with brass needle valve holder.


One Cover Plate with Needle Valve Holder for the O.S. Max .25LA and
the .25LA-S Airplane Engines.


Four 2.6mm x 8mm socket head cap screws (can use OSMG8678) to attach
cover plate to crankcase, connecting fuel line, and installing
needle valve assembly which consists of the Ratchet Spring
(OSMG8172), O Ring (OSMG7388), and the Needle (OSMG7017).


This cover plate does not include the needle valve assembly. The
version with the needle valve is OSMG4073.
No cover plate gasket is used with this engine.
JXS 1/15/01

– 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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Parts Compatibility
Parts Compatibility for O.S. Cover Plate 25LA
This item is a replacement part for the following:
 LXPUE0 O.S. 25LA ABN w/Muffler  (Parts List)
 LXPUE2 O.S. 25LA-S Control Line ABN w/Muffler  (Parts List)

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