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Here are some reproduced Service Letters from the private collection of Aeronca owners.   For official copies of these documents, please contact the type certificate holder, the FAA or other official sources.  Use at your own risk.

Some of the documents are missing. If you have a copy, please send them to me.

Continental Service Bulletins

Doc
Num		 Issued By
Issue Date		 Description Service Bulletin & Associated Files
M46-23  Continental
1/1/1946 		Valve Problem 
Need    
M46-24  Continental
1/1/1946 		Preventing Oil leaks in A & C Series Rocker Box Covers 
Need    
M46-25  Continental
1/1/1946 		Mag & Plug Gaps 
Need    
M46-32  Continental
1/1/1946 		Update on M46-23 Valve Problems 
Need    
M47-9  Continental
9/10/1947 		Piston Pin Change - Restatement of Bulletin #M46-13 
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M47-16  Continental
7/9/1962 		Procedure and Instructions for Engine Model or Series Conversion. A50-4 to -9; A65-1 to -9; A75-8; -9; -12; C75 and C85-8, -12. 
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M47-26  Continental
1/1/1947 		Crankshaft Update for A & C Series 
Need    
M48-12  Continental
1/1/1948 		First 50 Hr. Check – Extra info to prevent oil leaks and parts breakage 
Need    
M48-20  Continental
9/1/1948 		New Type Piston Pins and Plub Assembly. Models A65, C75, C85, C90, C125, and C145 
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M48-29  Continental
1/1/1948 		Fuel & Oil Recommendations 
Need    
M49-2  Continental
1/1/1949 		Cam & Filter Combinations for C90 
Need    
M49-4  Continental
1/1/1949 		C Series Generator Drive Coupling Changes 
Need    
M49-15  Continental
12/15/1949 		Usage and Identification of Valve Springs - A & C Series. (Supercedes M48-8) 
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M49-17  Continental
12/20/1949 		Cam Change for C90 
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M63-5  Continental
1/1/1963 		Fuel & Oil Recommendations 
Need    
M64-4  Continental
1/30/1964 		Delco-Remy Starter Adjustment. A65-12, C75, C85, C90, O-200, C125, C145, O-300. 
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M64-6  Continental
1/30/1964 		Prevention of Idling Failures on Four-Cylinder Engines. All Four-Cylinder Engines. 
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M65-14  Continental
11/15/1965 		Conversion of Engines from One Model to Another. 
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M74-16  Continental
6/17/1974 		Usage and Identification of Valve Springs - A & C Series. (Supercedes M49-15) 
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M76-4  Continental
3/12/1976 		Installation Instructions for Propeller Shaft or Crankshaft Oil Seals 
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M77-19  Continental
8/12/1977 		Intake and Exhaust Rocker Arm Identification and Application. C75, C85, C90, C-125, C-145, O-200, O-300 
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M79-11  Continental
1/1/1979 		Starter Clutch & Crankcase Mod for O-200 
Need    
SB96-7C  Continental
2/8/2005 		Torque Limits 
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SIL00-7A  Continental
2/5/2001 		Oil Guage Rod Application 
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