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Re: Mercury 200 EFI Oil Alarm Issues [Re: AgFisher08] #11983025 12/14/16 03:08 AM
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TLW Offline
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disconnect tha sensors one at a time... buzzer should stop when ya get to tha right one, motor tank cap, water in fuel (sensor on bottom of spin on filter), don't think yours will have rotation sensor ... if doesn't stop at all then ya probably gotta bad module... wouldn't hurt ta use a "mix" of 100 ta one till ya get it figured out.....

Re: Mercury 200 EFI Oil Alarm Issues [Re: AgFisher08] #11984976 12/15/16 03:34 AM
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OPTI Offline
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Is this a 3.0 Liter or a 2.5 Liter if its a 3.0 Liter it either a bad new float in the tank or sensor and if it is water in fuel there is no led light. If it is a 2.5 liter then water in fuel the led light will flash as horn flashes.....OPTI

Re: Mercury 200 EFI Oil Alarm Issues [Re: OPTI] #11985338 12/15/16 01:59 PM
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gary purdy Offline
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I asked the same question because he said he changed the complete oil tank.


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
Re: Mercury 200 EFI Oil Alarm Issues [Re: AgFisher08] #11985999 12/15/16 07:34 PM
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TLW Offline
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plain jane efi 200 3.0 not to common.. i guessed 2.5!!!

Re: Mercury 200 EFI Oil Alarm Issues [Re: TLW] #11987359 12/16/16 03:04 PM
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gary purdy Offline
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Originally Posted By: TLW
plain jane efi 200 3.0 not to common.. i guessed 2.5!!!
Agree but being in Houston area, a lot more salt water motors


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
Re: Mercury 200 EFI Oil Alarm Issues [Re: AgFisher08] #12033742 01/11/17 05:04 PM
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rejcek Offline
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I had this problem mechanic said it was due to using ethanol fuel gear being plastic?it also could be a striped crank gear and the oil pump not turning

Re: Mercury 200 EFI Oil Alarm Issues [Re: AgFisher08] #12033942 01/11/17 06:57 PM
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TLW Offline
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Originally Posted By: AgFisher08
I have used the boat a few times while the alarm is going off


this pretty much rules out an oiler gear failure.....

first 3.0 200 efi was 2003....

did ya find tha problem?....

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