They replaced the mapping whatever that is and second time they told me I ran it in trolling to condition to much and needed to run faster longer
my Brother in law has same issue with same motor

After paying over 6 hundred dollars, I still have the same problem
After traveling full speed across the lake 4 miles it will miss when trolling around 1200rpm and up yet if I turn the motor off and jig for half hour and start the motor it will then troll without a miss. When I travel back to dock at full speed the throttle down to troll into position it will start to miss again.. running out of money trying to fix at this dealer.