I just got this engine and can't find any info on it. Anyone know of this engine. It's a Mariner 40E serial # 6E9 S 1021.. So for I found that it was made in Japan by Yamaha for Mercury. Some of the parts can be found in the Yamaha parts book. I found that the fuel mix is 50:1 with regular unleaded less than 93 octane and more than 86 octane.