Service Bulletins
Over the years, Marvel-Scheblers's predecessors, Volare Carburetors LLC, Precision Airmotive Corporation, Facet Aerospace Products Company, Borg-Warner and Marvel-Schebler® Carburetor Company, have issued service bulletins, service letters, and other service information in a variety of formats. In addition, engine and airframe manufacturers have issued service publications, bulletins, letters etc. of their own relative to carburetors. Further, the Federal Aviation Administration has issued various Alerts and Airworthiness Directives.
Marvel-Schebler issues service information in the form of "Service Bulletins". The generic term Service Bulletin, is used by Marvel-Schebler regardless of the specific content of the bulletin.
This section contains data relative to the carburetors written by Marvel-Schebler and its predecessors. It does not contain copies of FAA information, including Airworthiness Directives nor does it contain engine and/or airframe service information (except, possibly, incidentally or by reference).
This section contains data relative to the carburetors written by Marvel-Schebler and its predecessors. It does not contain copies of FAA information, including Airworthiness Directives nor does it contain engine and/or airframe service information (except, possibly, incidentally or by reference).
IT IS THE ABSOLUTE REPONSIBILITY OF THE SERVICE AGENCY WORKING ON A CARBURETOR AND THE ABSOLUTE RESPONSIBILITY OF THE OWNER/OPERATOR OF AN AIRCRAFT EQUIPPED WITH A CARBURETOR TO IDENTIFY AND COMPLY WITH ALL PUBLISHED, APPLICABLE SERVICE INFORMATION – REGARDLESS OF WHEHER OR NOT IT IS CONTAINED IN THIS SECTION OF THE MANUAL. IN OTHER WORDS, THE SERVICE AGENCY/OPERATOR IS RESPONSIBLE FOR RESEARCHING ENGINE AND AIRFRAME MANUFACTURER'S DATA, IF ANY, AND FAA AIRWORTHINESS DIRECTIVES AND, IF THEY ARE APPLICABLE, COMPLYING WITH THEM.
| MARVEL-SCHEBLER SERVICE BULLETINS | |
|---|---|
| SB-28 | MA-3® Series Carburetors Equipped with Accelerator Pumps, MA-4SPA® Carburetors and Multiplex Versions of MA–4-5® Carburetors |
| SB-27 Rev. A | MA-3® and MA-4® CARBURETORS EQUIPPED WITH ACCELERATOR PUMPS |
| SB-26 Rev. O | ACCELERATOR PUMP DISCHARGE CHECK VALVE for MA-4-5®, MA-4-5AA®, MA-5® and MA-6AA® SERIES CARBURETORS |
| SB-25 Rev. O | THROTTLE SHAFT for MA-5® CARBURETORS |
| SB-24 | MA-4-5® carburetors with idle mixture screw mounting plate |
| SB-23 | New 36-540 Valve Release |
| SB-22 | New Fuel Nozzle |
| SB-21 | MARVEL-SCHEBLER®AIRCRAFT CARBURETORS |
| SB-20 | Use of Incompatible Clip and Float Can Affect Float Operation |
| SB-19 Rev B | Safety Alert - MSA Carburetor Maintenance Manual/Data Use |
| SB-18 Rev A | Loose Mixture Sleeves |
| SB-17 | Body To Bowl Fuel Leaks |
| SB-16 | Data Tags |
| SB-15 | Throttle Plate Screw Security |
| SB-14 Rev A | Part 178-47 (Float Bracket) for MSA Updraft Model Carburetors. |
| SB-13 | Accelerator Pump Plunger |
| SB-12 | Mixture Control Stop Repair – HA-6™ Type Carburetor. (This bulletin is in development and not published at this time.) |
| SB-11 Rev A | Unapproved Repair Practice |
| SB-10 Rev B | Unauthorized Thread Sealant |
| SB-9 Rev A | MA-4-5, MA-5™ & MA-6™ Series Accelerator Pump Lever Assemblies |
| SB-8 Rev B | MA-4-5™, MA-5™ & MA-6™ Series Carburetors Pump Discharge Valve |
| SB-7 Rev A | Mixture Control Stop Repair – HA-6™ Type Carburetors |
| SB-6 Rev A | Mixture Control Stop Wear – HA-6™ Type Carburetors |
| SB-5 Rev B | Superseded Service Bulletin MSA-13 |
| SB-4 Rev B | Bowl Clearance MA- Series Carburetors |
| SB-3 Rev A | HA-6™ Accelerator Pump Plunger |
| SB-2 Rev B | Required Replacement of Foam and Hollow Floats |
| SB-1 Rev A | Use of Unauthorized Parts in Volare Float Carburetors |
| PRECISION SERVICE BULLETINS, LETTERS, ETC. | |
| MSA-14 | Carburetor Throttle Body to Bowl Screw Inspection |
| MSA-13 | Replacement of Carburetor Floats with new Foam Floats |
| MSA-12 | Complete Revision of Carburetor Maintenance Manual |
| MSA-11 | Australian AV-Gas Contamination |
| MSA-10 | Casting Flaw in MA-4-5™ Throttle Bodies |
| MSA-9 | Carburetor Nozzle Replacement |
| MSA-8 | Carburetor Nozzle Replacement |
| MSA-7 | Carburetor Nozzle Replacement |
| MSA-6 | Improved retaining method for Mixture Control |
| MSA-5 | Use of Unauthorized Parts in Precision Airmotive Float Carburetors |
| MSA-4 | Consolidated fuel systems Service Bulletin CF-1-92, Revision 1, Dated 7/06/92 and airworthiness directive 92-15-16 |
| MSA-3 | Overhaul periods for float carburetors |
| MSA-2 | One piece primary and main venturi |
| MSA-1 | Replaced by MSA-13 (1/30/08) Assemblies on early model HA-6™ Carburetors |
| SIL MS-17 | New Pump Discharge Check Valve & Spring |
| SIL MS-16 | Availability of Alternate Pitot Tube (P/N 154-131-1) for HA-6™ Carburetor |
| SIL MS-15 Rev 1 | New Float for Large MA Carburetors |
| SIL MS-14 | New Float for HA-6™ Carburetors |
| SIL MS-13 Rev 1 | New Accelerator Pump Discharge Check Valve Assembly & the Removal of Throttle Shaft O-Rings and Retainers |
| SIL MS-12 | Poor Idle Cut-Off or Fuel Leakage After Shutdown |
| SIL MS-11 Rev 1 | New Float for Small MA Carburetors |
| SIL MS-10 Rev 1 | New Idle Tube Assembly and Economizer Setting for Model MA-4-5™ Carburetors, Part Numbers 10-5193, 10-5288, and 10-6102 |
| SIL MS-9 | New Idle Tube Assembly for Model MA-4-5™ Carburetors, Part Numbers 10-3878 and 10-6054 |
| SIL MS-8 | New Pump Plunger Assembly for Model MA-4SPA" Carburetors |
| SIL MS-7 | New Throttle Body to Bowl Gasket for Model HA-6™ Carburetors |
| SIL MS-6 | New Throttle Body to Bowl Screws for Small MA Series Carburetors |
| SIL MS-5 | Torque Specifications for MA Carburetor Drain Plug |
| SIL MS-4 Rev 1 | Introduction of Advanced Polymer Floats for MA Series Updraft Carbs |
| SIL MS-3 Rev 1 | Conversion Information for 10-6030-1 Carburetors |
| SIL MS-2 Rev 1 | Conversion Information for 10-6035-11 Carburetors |
| SIL MS-1 | New Lubricant for HA-6™ Pump Linkage Rods |
| SIL PAC-1 Rev 6 | Warranty Repair of Precision Airmotive RSA Fuel Injection Systems and MSA Float Carburetors |
| SIL No. 11-01-94 | Introduction of Advanced Polymer Floats for HA-6™ Model Carburetors |
| SIL No. 10-21-92 | Use of Unauthorized Parts in Precision Airmotive Float Carburetors |
| SIL No. 03-06-92 | Throttle Shaft Repair Kits |
| SIL No. 02-25-92 | Carburetor Kit Parts List |
| SIL No. 10-15-90 | Availability of Repair Parts for Facet Aerospace / Marvel-Schebler® Carburetors |
| MS80-430 | Rotax®/Bing Blue Epoxy Float - MS80-430 Installation Instructions |
| HISTORICAL SERVICE BULLETINS | |
| A1-69 | Required Inspection of the Drain Plugs for Excessive Thread Lubricant |
| A1-71 | Improved Method of Securing the Cam Lever |
| A1-76 | Carburetor Cleaning |
| A1-78 | Improved retaining method for mixture control assembly on Model HA carburetors with rotary mixture control as illustrated |
| A1-79 | HA-6™ Aircraft Carburetor Part No. A10-5206-1 |
| A1-81 | Model HA Carburetor Fload Shaft and Bracket Wear |
| A1-82 | Drain Plugs, Model HA Carburetors |
| A1-87 | Carburetor Return and Inspection |
| A1-88 | Possible Loose 62-226 Pins |
| A2-65 | Carburetor Replacement on the Lycoming 0-540-A1A Engines |
| A2-66 | Removal of the Throttle Opening Spring from A10-3965-12, A10-4115-1 and !10-4439 Carburetors |
| A2-78 | Improved Method of Sealing Pump and Economizer Rods to Reduce Throttle Friction on Model HA Series Carburetors |
| A2-79 | Model HA, Part #A10-5243 Used on Lycoming Engine Model 0-540 L3C5D used in Cessna Aircraft TR182 |
| A5-67 | Pump Inlet Check Valve Redesign |