I have a 1984 115 Yamaha , it has been in storage since 2011 , I drained & cleaned fuel system , removed carbs , disassembled & thoroughly cleaned , removed & cleaned fuel strainer , & added fresh fuel , it will crank but will not start until I have removed the spark plugs & primed the cylinders with a little fuel , then it fires up & runs just fine ! until I shut it off & let it set for aprox, 2 hours & then it wont start again ,, I installed new spark plugs , can anyone please offer some advise ,,, about out of ideas in Colorado ,,,, thanks ,,,
