All summer I've been trying to diagnose a problem with my 98 Evinrude 115 SPL. I am having intermittent problems reaching WOT, but the problem is becoming much more consistent.<br /><br />I have finally ruled out fuel starvation and carbs, so write those two off. This must be ignition related. Now bear with me, I want to explain everything this engine is doing to give a clear picture.<br /><br />Looses about 1300 RPM from normal WOT and seems to lack torque. Engine tone sounds lower. Problem seems to start somewhere around mid - 3/4 throttle.<br /><br />Usually runs fine for the first 10 minutes (but not always). However, as soon as I shut it off and restart it while the engine is warm, the problem begins to show itself. So- runs great at first, I shut down, even for a second, start back up and it sucks again.<br /><br />Sometimes after hitting a big wave or jolt, the problem disappears... unitll the next big wave or jolt, then it sucks again.<br /><br />This part really has me suspicious-<br />If I pull either plug, top or bottom, from the port side, the engine runs real rough (as to be expected on three cylinders), but I can give it throttle without stalling.<br />If I pull either plug, top or bottom, from the starbord side, I can only get to about 1/4 - 1/2 throttle before the engine stalls out.<br />Is this normal because of firing order or does it sound suspicious?<br /><br />This made me think power pack. Engine has only one power pack. Replaced it, problem still there.<br /><br />Swapped coils from left to right, problem did not switch sides.<br /><br />All plugs have been replaced, all wires are fine.<br /><br />My guess is that this leaves me with just the stator and timer base. But I'm not the ignition pro, that's why I'm asking this question.<br />HELP!!!<br /><br />And thank you very much-<br /><br />-Chad
<br />Make sure those carbs are not contaminated inside.<br />You may want to check spark on starboard side.Pull one plug and ground to motor(hold the boot w/a glove).Start motor with plug out,shade plug and observe color.Should be blue in color.If not,suspect coils or stator....You should own a repair manual if you don't have one.Good luck.