20hp Mariner info request - year? etc.

Aaron Murray

New Member
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I just purchased this motor on a 14ft duroboat. Wondering what year it is, and any other information/advice available. Thank you.
 
If that's a D in the serial number then it's a 1992. If it's a B, then a 1986 (Can't quite tell by your pics)
http://www.autorepairmanuals.biz/page/608072

Edit: This engine could have been made in a Yamaha factory under license from Mercury - the easiest way to tell is if it uses metric-head bolts (10mm/12mm) rather than Imperial.
 
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If that's a D in the serial number then it's a 1992. If it's a B, then a 1986 (Can't quite tell by your pics)
http://www.autorepairmanuals.biz/page/608072

Edit: This engine could have been made in a Yamaha factory under license from Mercury - the easiest way to tell is if it uses metric-head bolts (10mm/12mm) rather than Imperial.

Thank you for the info! It's a D, I'll check the bolt heads this evening. Metric = yamaha?
 
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