Electric Motors, Engines & Accessories > Components - R/C Engine > Back Plates / Cover Plates / Side Plates - R/C Engine [View Top Sellers for this Category] Bookmark this Page

O.S. - OSMG4072 OSM22557100 22557100 531028129436 4531028129436
Manufacturer Stock#
A Closer Look at This Product
  Tech Notes

Possible Substitutions

Regularly Purchased Together

Parts Compatibility

Browse O.S.

O.S. Cover Plate 25LA
O.S. Cover Plate 25LA
View Larger Picture

Parts Saver Eligible:Yes

Stock Number
Tower's Low Price
FREE shipping when ordering this item on our web site... click for more information
Stock Status
In Stock
Add To Cart
Add to wish list
—— Share ——

Quantity Discount
  Special Savings When Buying in Quantities
Special Stock Number Units at this Price Tower's Low Price Click to Order Quantity Discount Savings
O.S. Cover Plate 25LA Add to Wish List
13.92  Add To Cart .66  
O.S. Cover Plate 25LA Add to Wish List
20.79  Add To Cart 1.08  
O.S. Cover Plate 25LA Add to Wish List
34.45  Add To Cart 2.00  

Regularly Purchased Together
— Customers who purchased the above product also bought the following —
Although customers also purchased these, compatibility is not guaranteed. Click an item for product details.
1.  LXZ958 Master Airscrew 9x5 G/F G3 Nylon Propeller 1.89  Add To Cart
2.  LXCM65 O.S. Gasket Set 46LA 3.99  Add To Cart
3.  LXPT39 Tower Hobbies Build-It CA+ Medium Glue 2 oz. 6.99  Add To Cart
Product Image

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:

Click here for Units of Measure Conversion Calculators

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)

Tower Hobbies Has Been Serving Hobbyists Since 1971 • Call 800-637-6050 or 217-398-3636
See Tower Hobbies
Reviews at Bizrate.com
Hobbico, Hobby & Model Construction
Supplies - Retail, Champaign, IL
We accept the following: We accept the following payment methods: Discover, MasterCard, Visa, American Express, Diners Club International, JCB, China UnionPay, PayPal, and PayPal Credit.
Unauthorized use of any materials presented here is prohibited. Copying or reproducing any elements from this page is not permitted. All prices, descriptions and availability subject to change.
Copyright © Tower Hobbies All rights reserved. Do not duplicate or redistribute in any form.