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Jan 23rd, 2013
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Merc 150 opti high idle #12419984
09/09/17 01:48 PM
09/09/17 01:48 PM
Joined: Sep 2004
Posts: 62
little elm
618phoenix Offline OP
Outdoorsman
618phoenix  Offline OP
Outdoorsman

Joined: Sep 2004
Posts: 62
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?

Last edited by 618phoenix; 09/09/17 02:02 PM.
Re: Merc 150 opti high idle [Re: 618phoenix] #12421157
09/10/17 05:27 PM
09/10/17 05:27 PM
Joined: Jun 2004
Posts: 1,479
Benbrook Tex
O
OPTI Offline
Extreme Angler
OPTI  Offline
Extreme Angler
O

Joined: Jun 2004
Posts: 1,479
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

Re: Merc 150 opti high idle [Re: 618phoenix] #12421222
09/10/17 06:41 PM
09/10/17 06:41 PM
Joined: May 2003
Posts: 11,518
Littlefield Tx & Lake A. H. US...
gary purdy Online content
TFF Guru
gary purdy  Online Content
TFF Guru

Joined: May 2003
Posts: 11,518
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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