I know it's been asked 'what happened to throttle up propellers?". I can't find out what happened. I noted a lot of good input in the mid 200 era. I myself and several members of the olkd Jacksonville Performance Boat Club used them with great success and then one guy wrote about problems and then it all seemed to dry up. Help me out please.

What happened to them? They were great people with a great product>
Thanks.