texasfishingforum.com logo
Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
TraeMartin, Power-Pole CS, T-Rigger, JoeGoes, EcKo
119150 Registered Users
Top Posters(All Time)
hopalong 120,580
TexDawg 119,524
Bigbob_FTW 94,903
John175☮ 85,892
Pilothawk 83,264
Bob Davis 81,523
Mark Perry 72,297
Derek 🐝 68,312
JDavis7873 67,416
Forum Statistics
Forums59
Topics1,037,853
Posts13,935,641
Members144,150
Most Online39,925
Dec 30th, 2023
Print Thread
Page 1 of 2 1 2
Engine alarm going off on 2009 Merc 150 EFI #11750158 07/30/16 06:45 PM
Joined: Nov 2007
Posts: 36
B
burghman Offline OP
Outdoorsman
OP Offline
Outdoorsman
B
Joined: Nov 2007
Posts: 36
My alarm intermittently goes off when I'm on the lake. It has happened when I've been running 3/4 throttle but it also has happened when going slow in a no wake zone. The trim is low so I don't think that is the problem. The water pump appears to be working as well since it's always spitting water. I'm looking for a reputable place around Denton County to check it out Thanks.

Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11750200 07/30/16 07:34 PM
Joined: Mar 2015
Posts: 1,192
A
Anchorman Offline
Extreme Angler
Offline
Extreme Angler
A
Joined: Mar 2015
Posts: 1,192
Some of the slightly older mercs were bad about the oil reservoir caps cracking. If my memory is correct it's the small one on the front of the engine. Check that. That's a cheap easy fix it that is the problem. I'm not 100% sure which res cap it is so better check both of them. I just remember a cracked oil reservoir cap causing that symptom on many mercs. Good luck

Last edited by Anchorman; 07/30/16 07:35 PM.

If it ain't yours don't mess with it!
Need a friendly place to talk hunting? www.talkhunting.com

Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11751202 07/31/16 01:54 PM
Joined: Dec 2014
Posts: 1,665
M
Muzzlebrake Offline
Extreme Angler
Offline
Extreme Angler
M
Joined: Dec 2014
Posts: 1,665
Is it beeps or a steady squeal?


From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!

Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11751678 07/31/16 07:47 PM
Joined: May 2003
Posts: 11,586
gary purdy Offline
TFF Guru
Offline
TFF Guru
Joined: May 2003
Posts: 11,586
Oil level sensor in the motor mounted oil reservoir. Screen may need cleaned in the boat mounted main oil tank. 4 beeps can be water in the fuel.


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: Engine alarm going off on 2009 Merc 150 EFI [Re: Anchorman] #11751870 07/31/16 09:35 PM
Joined: Jan 2011
Posts: 515
Dude Lebowski Offline
Pro Angler
Offline
Pro Angler
Joined: Jan 2011
Posts: 515
Originally Posted By: Anchorman
Some of the slightly older mercs were bad about the oil reservoir caps cracking. If my memory is correct it's the small one on the front of the engine. Check that. That's a cheap easy fix it that is the problem. I'm not 100% sure which res cap it is so better check both of them. I just remember a cracked oil reservoir cap causing that symptom on many mercs. Good luck

It is usually the oil reservoir on the outboard. I also had an alarm module go bad on a 150 EFI before. It was a constant alarm every time you turned the key on. It started out intermittently.


Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11756399 08/03/16 01:51 PM
Joined: Jul 2011
Posts: 377
B
buggsboy Offline
Angler
Offline
Angler
B
Joined: Jul 2011
Posts: 377
I have the same model motor. In my case it was 4 beeps every few minutes. It was a problem with the oil level sensor in the oil reservoir under the engine cowling.


PB. 10 lb 12 oz
Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11756409 08/03/16 01:57 PM
Joined: Mar 2015
Posts: 1,192
A
Anchorman Offline
Extreme Angler
Offline
Extreme Angler
A
Joined: Mar 2015
Posts: 1,192
Yep that is what I was thinking. The cap has the oil level sensor built in to it. Easy to replace. Hopefully that is all it is.


If it ain't yours don't mess with it!
Need a friendly place to talk hunting? www.talkhunting.com

Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11773264 08/12/16 03:32 PM
Joined: Nov 2007
Posts: 36
B
burghman Offline OP
Outdoorsman
OP Offline
Outdoorsman
B
Joined: Nov 2007
Posts: 36
It's a steady squeal.

Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11773619 08/12/16 06:48 PM
Joined: Jul 2011
Posts: 377
B
buggsboy Offline
Angler
Offline
Angler
B
Joined: Jul 2011
Posts: 377
I wouldn't run it again with that steady squeal. I believe that is a more serious alarm. Identify problem before running again.


PB. 10 lb 12 oz
Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11774715 08/13/16 02:40 PM
Joined: May 2003
Posts: 11,586
gary purdy Offline
TFF Guru
Offline
TFF Guru
Joined: May 2003
Posts: 11,586
Solid tone is over heat on 2 strokes


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: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11774754 08/13/16 03:10 PM
Joined: Nov 2007
Posts: 36
B
burghman Offline OP
Outdoorsman
OP Offline
Outdoorsman
B
Joined: Nov 2007
Posts: 36
Any recommendations on where to take it for a once over in/around Denton County?

Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11774859 08/13/16 04:51 PM
Joined: Feb 2006
Posts: 3,742
B
bronco71 Online Content
TFF Team Angler
Online Content
TFF Team Angler
B
Joined: Feb 2006
Posts: 3,742
possibly t-stats or poppet valve?


1987 Nitro MX185/Mercury Black Max 150
1999 Triton TX21/225 Mercury Optimax
Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11776288 08/14/16 03:59 PM
Joined: May 2003
Posts: 11,586
gary purdy Offline
TFF Guru
Offline
TFF Guru
Joined: May 2003
Posts: 11,586
Certified shop just installed this last week. Told customer he had other problems. I decided to just check it.


Last edited by gary purdy; 08/14/16 04:02 PM.

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: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11776480 08/14/16 06:42 PM
Joined: Feb 2006
Posts: 3,742
B
bronco71 Online Content
TFF Team Angler
Online Content
TFF Team Angler
B
Joined: Feb 2006
Posts: 3,742
Wow, never seen one turned both ways before! Do you think they turned it the wrong way when installing it?


1987 Nitro MX185/Mercury Black Max 150
1999 Triton TX21/225 Mercury Optimax
Re: Engine alarm going off on 2009 Merc 150 EFI [Re: burghman] #11777015 08/15/16 12:31 AM
Joined: Dec 2014
Posts: 1,665
M
Muzzlebrake Offline
Extreme Angler
Offline
Extreme Angler
M
Joined: Dec 2014
Posts: 1,665
That's crazy. No way that could pump properly.


From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."

Then He made the earth round...and He laughed and laughed and laughed!

Page 1 of 2 1 2
Previous Thread
Index
Next Thread

© 1998-2022 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide
Powered by UBB.threads™ PHP Forum Software 7.7.3