Product Support Center
At AVStar Fuel Systems, we make every effort to supply you with the most up to date online technical publications, sales and service center information, service bulletins and letters, engine eligibility and more online. We also welcome your inquiries, comments, concerns and suggestions in real time during office hours. Please call Phone: 561-575-1560 or Toll Free: 866-982-7287 for service assistance. If we're not immediately available, we will return your call as quickly as possible.
Technical Publications
Fuel System Illustrated Parts Catalogs
All Models
Fuel System Installation, Operation & Maintenance Manual
Part No. AFS-IOM-01 ISSUED: September 25, 2023 REVISION: ORIGINAL
Models LVC-3-3A, LVC-3-3PA, LVC-5-4PA, LVC-5-5BPA, LVC-5-5PA, LHC-6-6BA and LHC-6-6BPA Carburetors
Fuel System Installation, Operation & Maintenance Manual
Part No. AFS-IOM-02 ISSUED: May 27, 2022 REVISION: ORIGINAL
Models LFR-NNSS5, LFR-NMLH10, LFR-NNLH10, LFR-NNLS10, LFR-NNSH10 & LFR-NNSM10 Servo Fuel Injectors with Air Bleed Injection Nozzles & Flow Divider
Sales & Service Centers
If you purchased your Engine from Lycoming, please follow Lycoming Service Letter L253 to follow the warranty procedure.
Here is our current list of Sales & Service Centers around the world. Please contact us directly or the service center closet to you before you send in your fuel system for repair.
Service Bulletins
AFS-SB1
ISSUED: AUGUST 04, 2009 REVISION:ORIGINAL
The use of AVStar's PMA parts in the overhaul & repair of carburetors.
AFS-SB2
ISSUED: AUGUST 06,2009 REVISION:ORIGINAL
The use of AVStar's brass floats in the overhaul & repair of carburetors
AFS-SB3
ISSUED: AUGUST 06,2009 REVISION:ORIGINAL
The inspection of float clearances in all MA series carburetors
AFS-SB4
ISSUED: MARCH 16, 2010 REVISION:ORIGINAL
The use of AVStar Accelerator Pump Plungers
AFS-SB5
ISSUED: MARCH 19, 2010 REVISION: ORIGINAL
The use of FAA-PMA Approved Replacement Parts in Fuel Injection Systems
AFS-SB6
ISSUED: APRIL 6, 2011 REVISION:2
The fracture of a fuel diaphragm stud in fuel servos
AFS-SB7
ISSUED: JULY 23, 2014 REVISION:1
This Service Bulletin defines the overhaul requirements for carburetors manufactured by AVStar Fuel Systems, Inc.
AFS-SB8
ISSUED: MAY 16, 2015 REVISION: 2
This Service Bulletin applies to all LVC-3-3A, LVC-3-3PA, LVC-5-4PA, LVC-5-5BPA, LVC-5-5PA, LHC-6-6BA and LHC-6-6BPA and all legacy aircraft carburetors manufactured by AVStar Fuel Systems, Inc.
AFS-SB9
ISSUED: DECEMBER 2, 2013 REVISION: ORIGINAL
This Service Bulletin applies to all AVStar manufactured servos (RSA-5AD1, RSA-10AD1, or RSA-10ED1) plus any servo fitted with Fuel Diaphragms manufactured by AVStar.
AFS-SB10
ISSUED: DECEMBER 5, 2013 REVISION: ORIGINAL
This Service Bulletin applies to AVStar manufactured RSA-5AD1 and RSA-10AD1 servos mounted in an updraft configuration.
AFS-SB12
ISSUED: July 1, 2014 REVISION: ORIGINAL
This Service Bulletin applies to all AVStar manufactured servos (RSA-5AD1, RSA-10AD1, or RSA-10ED1)
AFS-SB13
ISSUED: May 20, 2016 REVISION: ORIGINAL
This Service Bulletin applies to all AVStar manufactured fuel system Flow Dividers (AV2524232-2, AV2576624-1, AV2576564-1, and AVX3015004-1) manufactured between the dates of October 1, 2015 and March 23, 2016 per the serial numbers listed in Appendix A.
AFS-SB14
ISSUED: April 23, 2020 REVISION: 1
This Service Bulletin applies to certain carburetors manufactured by AVStar Fuel Systems, Inc. that were installed on Guimbal Helicopters aircraft equipped with 0-360-J2A Engines.
AFS-SB15
ISSUED: 1/8/19 REVISION: 2
This Service Bulletin applies to the following AVStar manufactured carburetors: Models LVC-5-5PA & LVC-5-5BPA (formerly identified as MA-4-5®) Part Numbers AV10-3878, AV10-4164-1, AV10-4404, AV10-4404-1, AV10-5054, AV10-5193, AV10-6035-11 & AV10-6054. Applicable AVStar carburetors were originally manufactured between January and September of 2011.
Service Information Letters
AFS-SIL-01
ISSUED: June 10, 2019 REVISION: 1
LFC-10AD2 AV2581500 Servo Installed on Lycoming IO-390 Engines being operated primarily at high density altitude airports
AFS-SIL-02
ISSUED: November 13, 2020 REVISION: ORIGINAL
This Service Instruction applies to all AVStar manufactured servos (LFR-NNSS5, LFR-NNLS10 and other models) fitted with Fuel Inlet Strainers manufactured by AVStar. The Fuel Inlet Strainer part numbers are AV2537608 & AV2537610.
AFS-SIL-03
ISSUED: February 1, 2022 REVISION: ORIGINAL
This Service Instruction applies to all AVStar manufactured carburetors LVC-3-3A, LVC-3-3PA, LVC-5-4PA, LVC-5-5BPA, LVC-5-5PA, LHC-6-6BPA & LHC-6-6BA. This service information letter provides information for setting up the proper idle mixture rise and serves as a supplement to the instructions in the Engine Operating Manual.
Engine Eligibility
RECOMMENDATION: This list is for reference ONLY. Please contact the engine manufacturer and check all aircraft documentation for information.