Part Number: FG-SK-1


Eligibility Notice

Please verify that this product is eligible for your aircraft before adding it to your cart.

Click here to view product eligibility.

Product Details

Avglas STC Repair Kits for Continetal Carb Heat Boxes 
New hardened stainless steel bearing for improved vibration resistance and longer life!


More Detail

FAA-PMA/STC kit includes:

  • Replacement shaft, arm, and detent spring assembly
  • Bearings 
  • Bearing housing 
  • Locknut and washer 
  • Complete instructions


Engine model Continental Airbox part number Avglas part number
C-75 50256 FG-100
C-85 50256 FG-100
C-90 50256 FG-100
O-200 628122, 653675, 641534 FG-100
O-300 530852, 531143 FG-105

Note: Avglas repair kits are only applicable to aircraft equipped with the specified Continental airbox.


The butterfly (not included in the kit) must be brazed or tack welded to the shaft during installation, and the bearing housings must be brazed, tack welded or flush riveted to the carburetor heat box. Avoid applying excessive heat during brazing or tack welding or the hardened stainless steel bearing may be damaged. See the installation instructions for complete details: Shaft Kit Installation Instructions.

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warningWARNING: Cancer and/or Reproductive Harm -

Kit Components

Part Number FG-SK-1 contains the following:

Component Description Quantity U/M
FG102S SPRING (Avglas) 1.000 EACH
MS20613-3-P3 RIVET 2.000 EACH

Eligible Aircraft

Make Series Model Beginning S/N Ending S/N Quantity Per Aircraft Location Comment Eligibility Chart
Continental 200 O-200-A 0 ZZZZZZZZZZZZZZZ
Continental 200 O-200-B 0 ZZZZZZZZZZZZZZZ
Continental 300 O-300-A 0 ZZZZZZZZZZZZZZZ
Continental 300 O-300-B 0 ZZZZZZZZZZZZZZZ
Continental 300 O-300-C 0 ZZZZZZZZZZZZZZZ
Continental 300 O-300-D 0 ZZZZZZZZZZZZZZZ
Continental 300 O-300-E 0 ZZZZZZZZZZZZZZZ
Continental 75 C-75 0 ZZZZZZZZZZZZZZZ
Continental 75 C75-2 0 ZZZZZZZZZZZZZZZ
Continental 85 C-85 0 ZZZZZZZZZZZZZZZ
Continental 90 C-90-12F 0 ZZZZZZZZZZZZZZZ
Continental 90 C-90-14F 0 ZZZZZZZZZZZZZZZ
Continental 90 C-90-8F 0 ZZZZZZZZZZZZZZZ

Related Documents

Supplemental Type Certificate Use Authorizations

McFarlane STC Use Authorization

Product Catalogs and Price Lists

Current McFarlane Product Catalog