SB-20 Alon/Forney/Mooney Cylinder Head Temperature Indicator

Alon Service Bulletin No. 20


  • Forney F-1 and F-1A with Continental C-90 engine and Marvel-Schebler MA-3-SPA carburetor
  • Alon model A-2, serial numbers A-2 thru A-245
  • Alon/Mooney model A2-A, serial numbers B-246 thru B-299
  • Mooney M-10, serial numbers 690001 thru 690011, 700001 thru 700050

System: Engine

Issue Date: -

Subject: Installation of cylinder head temperature indicator

Summary: Reports have been received indicating overheating of cylinder heads. To provide continuous indication of engine operating temperatures accomplish the following.

Open PDF: ALON_SB20.pdf