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Dec 30th, 2023
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 Mercury 200 EFI Oil Alarm Issues
#11970916
12/07/16 02:52 PM
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Joined: Feb 2009
Posts: 78
AgFisher08
OP
Outdoorsman
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OP
Outdoorsman
Joined: Feb 2009
Posts: 78 |
I have had my motor worked on twice because the oil alarm will not stop going off. The tank on the motor with the float was completely replaced as well as the cap on the main reservoir. I have used the boat a few times while the alarm is going off and the tank on the motor keeps oil in it at all times. Any suggestions on what could be still causing the alarm to go off? My only other guess at this point is a fault alarm system.
Gig Em' 08
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11970940
12/07/16 03:05 PM
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Joined: Mar 2010
Posts: 25,786
T Bird
TFF Guru
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TFF Guru
Joined: Mar 2010
Posts: 25,786 |
Without a system schematic I/you will be guessing. Normally it is just the engine oil tank cap sensor.
Your mechanic should continue to work the problem for you (no charge) and contact Mercury and your boat Mfg. for assistance/schematic's. If they won't do this, take it to a different shop specializing in Mercury Outboards.
Okie by birth, Texan by choice. ![[Linked Image]](https://texasfishingforum.com/forums/pics/userpics/2021/01/full-47849-80883-111.jpg) USAF "Thunderbirds" Alumni 1985-1989
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11970987
12/07/16 03:22 PM
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Joined: Feb 2005
Posts: 40
RED70
Outdoorsman
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Outdoorsman
Joined: Feb 2005
Posts: 40 |
Are you sure it is oil alarm? Is it solid tone or beeping fast? What year model
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11971548
12/07/16 07:31 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Model # of your motor? Sounds like you have a 3 liter by your description of replacing the 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
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: RED70]
#11971732
12/07/16 09:48 PM
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Joined: Feb 2009
Posts: 78
AgFisher08
OP
Outdoorsman
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OP
Outdoorsman
Joined: Feb 2009
Posts: 78 |
Are you sure it is oil alarm? Is it solid tone or beeping fast? What year model Beeping fast. I also changed out the fuel/water separator thinking that may be the issue but no luck.
Gig Em' 08
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: gary purdy]
#11971734
12/07/16 09:48 PM
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Joined: Feb 2009
Posts: 78
AgFisher08
OP
Outdoorsman
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OP
Outdoorsman
Joined: Feb 2009
Posts: 78 |
Model # of your motor? Sounds like you have a 3 liter by your description of replacing the oil tank. Not 100% sure. Its a 2000 year model 200 EFI.
Gig Em' 08
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11971793
12/07/16 10:23 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
The numbers off of the tag on the transom mount 
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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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11972388
12/08/16 02:38 AM
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Joined: Jun 2004
Posts: 1,509
OPTI
Extreme Angler
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Extreme Angler
Joined: Jun 2004
Posts: 1,509 |
It will be either the oil level in the engine oil tank or water in fuel if it is water in fuel there is a red led light at the bottom of ecu a little black box and when the horn sounds the light will flash that is the way to tell the difference in oil or fuel.....OPTI
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11972862
12/08/16 01:39 PM
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Joined: Jul 2010
Posts: 1,349
boatman025
Extreme Angler
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Extreme Angler
Joined: Jul 2010
Posts: 1,349 |
it also could be a striped crank gear and the oil pump not turning
Hughes Marine
3855 Osage Lane
Wylie ,Texas
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11972883
12/08/16 01:49 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Don`t think the 2000 has a rotation sensor. Also this year when it gets a water alarm it beeps 4 times every minute or so.
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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Re: Mercury 200 EFI Oil Alarm Issues
[Re: gary purdy]
#11973049
12/08/16 03:00 PM
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Joined: Feb 2009
Posts: 78
AgFisher08
OP
Outdoorsman
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OP
Outdoorsman
Joined: Feb 2009
Posts: 78 |
The boat is back in storage and I dont know when I will have a chance to go back and look at the model #. I was just curious what some other suggestions may be. The alarm is beeping non stop the entire time the motor is running so I assumed it was the oil alarm. I will have to look into the striped crank gear.
Gig Em' 08
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11974199
12/09/16 01:36 AM
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Joined: Oct 2005
Posts: 794
TexasPescado
Pro Angler
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Pro Angler
Joined: Oct 2005
Posts: 794 |
I have had my motor worked on twice because the oil alarm will not stop going off. The tank on the motor with the float was completely replaced as well as the cap on the main reservoir. I have used the boat a few times while the alarm is going off and the tank on the motor keeps oil in it at all times. Any suggestions on what could be still causing the alarm to go off? My only other guess at this point is a fault alarm system. Mine is doing the same thing. I've replaced everything that you have and still getting the alarm. If you happen to figure it out, please post an update here.
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11974268
12/09/16 02:16 AM
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Joined: Jun 2004
Posts: 1,509
OPTI
Extreme Angler
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Extreme Angler
Joined: Jun 2004
Posts: 1,509 |
Mercury stopped putting the motion sensor on the oil gear in 1999 so if it is intermediate horn it is water in the fuel because the oil float switch has been replaced......OPTI
Last edited by OPTI; 12/09/16 02:16 AM.
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: AgFisher08]
#11980948
12/13/16 02:30 AM
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Joined: Nov 2006
Posts: 2,848
TLW
Extreme Angler
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Extreme Angler
Joined: Nov 2006
Posts: 2,848 |
if tha thing starts "singin' instantly when key is turned on then ya probably gotta bad module.. it can and will go through tha "self test" then never stop untill ya turn tha key off.. although "normally" but not held as"fact" a bad module will generate a "solid" tone same as overheat.....
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Re: Mercury 200 EFI Oil Alarm Issues
[Re: TLW]
#11981576
12/13/16 02:40 PM
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Joined: Feb 2009
Posts: 78
AgFisher08
OP
Outdoorsman
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OP
Outdoorsman
Joined: Feb 2009
Posts: 78 |
if tha thing starts "singin' instantly when key is turned on then ya probably gotta bad module.. it can and will go through tha "self test" then never stop untill ya turn tha key off.. although "normally" but not held as"fact" a bad module will generate a "solid" tone same as overheat..... The alarm starts sounding as soon as the key is turned. They motor doesnt even have to actually be on before it starts. The alarm is a beep and not a constant tone.
Gig Em' 08
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