Originally Posted by
JR19
I am not familiar with the new four stroke motor from Mercury but I do know on my older Evinrude there was a TPS sensor (throttle position sensor). It had to be set to match with the actual position of the throttle. A tech sets the throttle linkage so it achieves 100% full throttle. Then the TPS sensor is set to recognize the position of 100%. If my memory is correct in the event it reaches 105% or more throttle a check engine alarm will sound. I think my new Evinrude is also the same way. How I learned this on my old motor. I was by trying to gain rpm...I adjusted my hotfoot for more travel but got a check engine alarm. When I took it to the dealer they hooked my engine to a computer and told me my TPS sensor detected overtravel. I told them what I had done. They set the screw back on the hotfoot so the TPS sensor was in alignment with true 100% throttle and I never had an alarm again...long story short you might be able to adjust the screw a little but if you get a check engine alarm you probably need to have a tech set TPS sensor to coincide with the hotfoot linkage. Again this is for an older Evinrude. I don't even know if the new Mercury's have a TPS sensor.