2015 merc 50efi sn# 1C305826 model 1A51413BZ. Outboard will stall out when running around 1500 rpms. Also it will sometimes idle rough when you bring the rpms down. 2000rpm and up it runs fine. Also the voltage at idle is 14.4 and at full rpm it is 14.4 it dosent seem to change.
Have your dealer check the IAC Duty Cycle and see where it parts with the engine idling when warm. May be as simple as an adjustment that needs to be done.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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