I have a 1985 Evinrude 15HP tiller on a 14' fishing boat. The motor is clean as a pin and runs like a top. Since I've owned it (bought it last summer), it is really tough to get started when I launch it (cold). After it has been run, it will start on the 1st pull everytime warm. I replaced the plugs (tho the old ones looked fine), decarboned last fall, and choke is working correctly. I squeeze the bulb till hard, twist thottle to start position, pull choke and begin the "workout". It usually will "try" to hit on the 2nd or 3rd pull but nothing after that till it finally does fire. One thing I might add is the "base" setting for the low speed mixture on this motor is 1 and a half turns out, mine is set and idles best at 3/4 turns out. Any input or advice would be greatly appreciated!!