This is an estate sale find. The original owner said he took it out of an old boat he was restoring and upgrading. He claimed it works, but I've never seen it work and am clueless on how to test it

This is sold as is and as described. There are no returns or refunds on this item for any reason whatsoever.

Once you pay for this item, you own it and agree to these terms

Please ask lots of questions and if you happen to know how I van test it.. let me know in the messages and I'll do exactly that.. thanks for looking