Two problems related to engine stall have been reported for the 2010 Mercury Mariner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Mercury Mariner based on all problems reported for the 2010 Mariner.
I have no throttle response, engine rpm drop back to an idle, engine runs rough and stalls. No power. Moving to the side of the road, turn engine off and restart and will runs fine, but today this problem reoccurred every 4 miles. I was only 22 miles from home but that is a lot of stopping along side of the road.
Engine stalled while driving at highway speed, started surging, running very rough and would not go any faster than about 15 mph. The vehicle was stopped and shut off. After a few minutes the vehicle was started and seemed to run normally. The vehicle ran normally until 10/05/2012 when it stalled and ran very rough again. At this time the vehicle was being driven to the local dealer for a check. While waiting for a call back from the dealer the vehicle was restarted and seem to run normally again. After talking to the service mgr. , it was learned that the problem most likely was the throttle body and it would not be under warranty. At this time it was decided to take the vehicle to a local shop that we were very pleased with for past service for other vehicles within our family. The local shop ordered and installed a new throttle body and the vehicle has performed normally.