I have a Johnson 6.0 Sailmaster, Mod. J6SLETB<br />Ser. B 09008319 by Outboard Marine Corp. Belgium. What year was it made, and what oil/gas mix should it use. It's been sitting for a couple of years, but it started up OK after a few pulls. Gas is what was in the tank (amazing it runs with old fuel). Would like to get a manual for it also. Thanks in advance. 