I just bought a 82 Ranger with a 82 merc 150hp. I bought from a friend,it satfor 2+ years with gas in it, no stabil. The motor was just rebuilt in 98, so it should be in good shape. He started it in the fall and said it would not run, no surprise there. How do I get the gas and varnish out of the system and tanks? Is it something I can do myself or do I have to take it to a shop? Is there any major damage that could have been done? <br />Thanks,<br />Tom