As a new individual to the boating scene I am looking at buying a used Yamaha 70BETO outboard. Problem is I am not sure that I am being given a straight deal here as the seller is claiming that the offered Yammie is a 92 model. I'm not real sure that it is. Is there some way to detremine the manufacture date from the serial No. at all? The serial No is 6H3 L 429420. Any help would be appreciated <br /><br />