Trying to use Mercury Parts Express (http://www.mercurypartsexpress.com/PartsExpress/ProductSelection/ServiceParts/sphome.asp?CID=) to order some parts. I enter the 7 digit s/n I see on the id plate located on the motor mount but get a message saying: "Serial number 05674970 was not found. Please try again." Does this s/n look right? Does anyone else use the Website to order parts? Any suggestions on what the problem may be is appreciated. Thanks.<br /><br />Motor is a 79' 115