I have a 40h force Johnson, and the year is 1991. A black round rubber washer, fit between the anode and the thrust hub where the propeller at got torn up. I took it to the mechanic and ask for a new part. No one seem to know what it is and what it calls. If any one out there know what I am talking about. Please, let me know. I am willing to give you more info if I miss out on any useful information.<br /><br />Thank you, in advance.