I ran my 50 hp 4 strke to the middle of lake than died I started back up and it ran on 2 cyl, took to machanic and was told bad gas and the carbs needed rebuilt. $800 ) I think this is BS because gas was only 2 mths old with stablize in it. I shot carb cleaner in top 2 carbs and almost killed engine [ like normal] shot it in bottom 2 and after 2 sec it reved up the engine for a few sec than back to missing , any help on what is going on Thanks Hogman