took the boat out Monday,came out of hole great and got to 5000rpm's and started cutting out and bogging down,went back tuesday and cranked it and seemed to be missing,so put her back on trailer and took it to shop!!!welll heard everything from coil to bad gas,gas lines etc.all i did different from last time out was put gas in it and seafoam!!!Well today shop calls and said come and get it, good to go, nothing wrong with it!!They ran it and said everything is good!!any Ideas???
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Do you know if they ran an "Auto Self Test- Plugs OUT of Cylinder Head" while on the Computer Diagnostic System?
If not, I would ask them to run this test a couple of times (COLD and HOT), while monitoring SPARK on a spark tester.
Of course, there are many other potential causes.... but this would be a good starting point.
PRINTOUTS of the RUN HISTORY and FREEZE FRAME (Fault) History might also contain helpful information and data (not always readily apparent.... sometimes the "devil is in the data details").
One more simple item that can cause INTERMITTENT performance problems:
http://www.bbcboards.net/zerot...first
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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