I have a 1994 Johnson 15 horse manual start, manual choke tiller. I sent the motor to a reputable shop and asked them to ix anything they found wrong. The motor would not low idle. They rebuilt the carb, and said that was the only issue they could find. I replaced the lower end oil and water pump. With muffs on, it started fine, idled great, went into forward, and reverse fine. Got it to the lake yesterday, and it started fine, went into reverse ok, but then when I put it into forward it died. This kept happening. Finally I pulled the cover, and opened the fuel pump to check the screen. It was clear. Pulled both plugs to see if it was flooding. Finally I found the upper ignition plug wire was broken. I fixed that, and figured that was the issue. Seemed better after that, but then continued to do it the rest of the day. I had to rev up the motor, and put it in gear. At idle it would just not go into forward without dying. Once going, it was fine. Got it up to 18 mph at one point. I have ordered new plug wires, but it is weird that in reverse the motor goes fine at idle, but not forward. Any ideas or does it sound like a ignition issue that new wires should fix?