7GCB Spinner help

bmc1818

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Oct 16, 2026
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Questions Im hoping some citabria experts can help with-

1. What is the diameter of the spinner I should have for a Sensenich 74dm6 prop?
2. I ordered Spinner Dome part 4-1406 from ACA - Does anyone have a used backplate and bulkhead (aca part # 3 1362 and 4 1387)
3. Anyone have a complete used spinner set with all three parts they would sell ?


My annual is underway and my spinner was showing stress cracks at a couple screw holes. After a bunch of looking around I figured out there are only two fixes, repair by the one shop allowed to repair the spinner -Aero Support Engineering, International, Inc. or get a new spinner from ACA. I elected to get a new spinner from ACA which is completely different than the spinner I had.

Pic attached
 

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That looks like what went on my 7GCBC when it underwent a rebuild. I can try to get over to the plane tomorrow and get a measurement.
 
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