Years ago I installed a Simplified
Marine Technologies APA Adaptor H5 to mount cone zincs on my Autoprop. It worked as advertised with no issues.
I now need to remove it in order to pull the prop. The company is out of business and I cannot find any
documentation.
My first impulse was to use a wrench but then noted a "No Wrench" imprint on the adapter. I'm now officially at a loss.
Does anyone have any idea of how to do this ? I've attached a
photo of the adapter.
We would greatly appreciate some help here.

Sam
s/v Grace PSC34-163