I am running a 1994 DT140. The engine runs smooth but is not producing much power. It feels like a 75Hp. I have finally determined that the timing is not advancing, using a timing light, when the throttle is opened. I think I have ruled out the throttle position sensor. What else can interefere with the timing advance? Can the ignition timing sensor (thermistor) cause this issue. I understand that sensor to control the timing advance at start-up during warm-up for 3 seconds or 15 seconds depending on whether the engine is warmed up or not. I was getting an open on this sensor when trying to check the resistance. Regardless, that function seems to work properly. But running at cruising speed my timing is still 6-7 degrees ATDC. Any thoughts?
