Go Back  Offshoreonly.com > Technical > General Q & A
2004 Merc 575 warning siren won't go away >

2004 Merc 575 warning siren won't go away

Notices

2004 Merc 575 warning siren won't go away

Thread Tools
 
Old 07-14-2016, 07:35 PM
  #1  
Registered
Thread Starter
 
Join Date: Jan 2008
Location: San Diego
Posts: 2,357
Likes: 0
Received 2 Likes on 2 Posts
Default 2004 Merc 575 warning siren won't go away

It has 76 lbs oil pressure, 110 oil temp and 140 water temp . 30 psi fuel pressure runs great. Just all of a sudden it stays on?? any Ideas
mcprodesign is offline  
Old 07-14-2016, 07:37 PM
  #2  
Registered
Thread Starter
 
Join Date: Jan 2008
Location: San Diego
Posts: 2,357
Likes: 0
Received 2 Likes on 2 Posts
Default

all I did is replace fuel lines on the throttle body.. ( on both engines)
mcprodesign is offline  
Old 07-15-2016, 08:24 AM
  #3  
Registered
 
Join Date: Jul 2007
Location: MI
Posts: 2,639
Received 14 Likes on 8 Posts
Default

Mine had the same problem, it was a wet oil pressure sensor, a different one than the gauge uses.
JRider is offline  
Old 07-15-2016, 08:39 AM
  #4  
Platinum Member
Platinum Member
 
F-2 Speedy's Avatar
 
Join Date: May 2012
Location: Midwest & T-Rock
Posts: 10,562
Received 3,168 Likes on 1,411 Posts
Default

Im assuming their efi ? if so fuel pressure seems low for, should be in the low 40's, are they bravo drives ?? drive reservoir low ? solid tone or interupted

Last edited by F-2 Speedy; 07-15-2016 at 08:42 AM.
F-2 Speedy is offline  
Old 07-15-2016, 09:18 AM
  #5  
Registered
Thread Starter
 
Join Date: Jan 2008
Location: San Diego
Posts: 2,357
Likes: 0
Received 2 Likes on 2 Posts
Default

It sounds like intermittent and solid both cause it changes a little art first. It only comes on after the high idle . It does not come on in the first 10 seconds or so. It will not go away at any rpm. Maybe it is a sensor for low pressure like J rider said? Unhooked the drive reservoir sensor wires and it's half full too.
mcprodesign is offline  
Old 07-15-2016, 09:23 AM
  #6  
Registered
Thread Starter
 
Join Date: Jan 2008
Location: San Diego
Posts: 2,357
Likes: 0
Received 2 Likes on 2 Posts
Default

what sensors does it have that set that off? I would think oil pressure for sure, water temp for sure . it there more than that to check?
mcprodesign is offline  
Old 07-15-2016, 09:25 AM
  #7  
Platinum Member
Platinum Member
 
F-2 Speedy's Avatar
 
Join Date: May 2012
Location: Midwest & T-Rock
Posts: 10,562
Received 3,168 Likes on 1,411 Posts
Default

That's a make switch on the drive bottle, when unhooked the circuit is open and will alarm, did you hook the wires together to close the loop
F-2 Speedy is offline  
Old 07-15-2016, 10:46 AM
  #8  
Registered
Thread Starter
 
Join Date: Jan 2008
Location: San Diego
Posts: 2,357
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by 33outlawsst
That's a make switch on the drive bottle, when unhooked the circuit is open and will alarm, did you hook the wires together to close the loop
That's what I thought . Thank you. The guy at the dock was telling me it was the other way
. I will try it
mcprodesign is offline  
Old 07-15-2016, 05:41 PM
  #9  
Registered
 
Join Date: Jul 2007
Location: MI
Posts: 2,639
Received 14 Likes on 8 Posts
Default

Originally Posted by 33outlawsst
Im assuming their efi ? if so fuel pressure seems low for, should be in the low 40's, are they bravo drives ?? drive reservoir low ? solid tone or interupted
It is not a high pressure EFI system, that pressure is fine. It has two 90s throttle bodies off dump truck motors...true story.
JRider is offline  
Old 07-15-2016, 05:43 PM
  #10  
Registered
 
Join Date: Jul 2007
Location: MI
Posts: 2,639
Received 14 Likes on 8 Posts
Default

Originally Posted by mcprodesign
That's what I thought . Thank you. The guy at the dock was telling me it was the other way
. I will try it
Unplug to bypass alarm
JRider is offline  


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.