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#12419984 - 09/09/17 08:48 AM Merc 150 opti high idle
618phoenix Offline
Outdoorsman

Registered: 09/24/04
Posts: 56
Loc: little elm
Motor ran fine getting off the trailer but was dead after parking the truck. Idles high and dies immediately now. I did replace the battery this morning if that helps.

Got it to stay started after sitting for an hour but the alarm goes off at 2k rpm.
Suggestions?


Edited by 618phoenix (09/09/17 09:02 AM)

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#12421157 - 09/10/17 12:27 PM Re: Merc 150 opti high idle [Re: 618phoenix]
OPTI Offline
Extreme Angler

Registered: 06/23/04
Posts: 1422
Loc: Benbrook Tex
What is happening is your getting fuel in the air side. Could be a number of things that can cause this torn diaphragm in the tracker valve or air or fuel pressure regulators. Leaking fuel injector or weak air compressor and the alarm could be from overheating air compressor. Need to take it in and have it look only way you will find what alarm is by hooking up to Mercury diagnostic program......OPTI

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#12421222 - 09/10/17 01:41 PM Re: Merc 150 opti high idle [Re: 618phoenix]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11129
Loc: Littlefield Tx & Lake A. H. US...
Had an Optimax with this alarm and it turned out to be that the water strainer needed cleaning. Look at a cooling schematic. It is where the thermostat hoses connect at the exhaust adaptor. #8 here: http://www.boats.net/parts/search/Merc2/Mercury/V-150%20DFI%20%282.5L%29/0T178500%20THRU%200T800999/WATER%20HOSES/parts.html
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The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD

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