So I had a beautifully running 2005 Johnson 15 hp this summer that started up easily (2 pull usually). It sat for about 2 months without use, but with gas in it (ethanol free). I've been able to get it started twice in the past three weeks, but can't get any consistency out of it. It's a pull start. July - Carb rebuilt, motor completely tuned. Plugs changed - last week (for the third time since spring) Flushed out the old gas before changing plugs. New gas, different tank two weeks ago. Last weekend I ran it for ~ 15 min, then disconnected the fuel line to let it run out. The motor sounds very close to starting, as opposed to having dead plugs, but it "coughs" instead of firing. Any suggestions would be great, and as always, thanks in advance for your time and knowledge!