Mercruiser 5.7 intermittent alarm
Submitted by Wilzee on Wed, 2016-02-10 14:23
old mate has a Mercruiser 5.7 that sounds an alarm when it is first started at the ramp and then stops once the boat is up and running. It then won't sound for the rest of the day.
It doesn't do it when flushed with freshwater.
He has taken it in for diagnostics twice but they couldn't find any thing wrong. He's now reluctant to hand over any more money for no result.
He's at a loss as what to do next.
Any advice would be appreciated.
Thanks in advance.
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"My greatest problem lies in reconciling my net income with my gross habits"
lame
Posts: 315
Date Joined: 20/01/10
could be
Faulty over heat senor or he hasn't been another being caught out by the furuno low battery Alarm
Does he run a furuno ?
lame
Posts: 315
Date Joined: 20/01/10
Just Google search
Just Google search mercruiser 5.7 alarm looks like he's not the first to have that problem
Only read one with someone giving advice to multimeter the 3 sensors (cooling,transmission and oil pressure) to see which ones causing it
So possibly a faulty sensor
Wilzee
Posts: 93
Date Joined: 10/12/14
thanks for the reply lame. He
thanks for the reply lame.
He doesn't have a Furuno on board but a good point worth considering.
We can check the sensors with a multimeter, I guess we will need to get hold of a manual to find the sensors and also values we should be looking at.
"My greatest problem lies in reconciling my net income with my gross habits"
Dan_9
Posts: 80
Date Joined: 10/12/14
What year is it? Mpi? Or
What year is it?
Mpi? Or carb ?
Wilzee
Posts: 93
Date Joined: 10/12/14
Dan its 2009 model MPI I
Dan its 2009 model
MPI I believe
"My greatest problem lies in reconciling my net income with my gross habits"
lame
Posts: 315
Date Joined: 20/01/10
i guess
You would need to multi read whist the alarm is going off ?
This is the one at the top when I Google searched the above but was many more
www.shamrockboatownersclub.com/forums/showthread.php
Wilzee
Posts: 93
Date Joined: 10/12/14
thanks lame we will check out
thanks lame we will check out the link.
"My greatest problem lies in reconciling my net income with my gross habits"
Dan_9
Posts: 80
Date Joined: 10/12/14
javascript:void(0);/*14551472
javascript:void(0);/*1455147265211*/
Have a look here
Wilzee
Posts: 93
Date Joined: 10/12/14
thanks Dan but I cant open
thanks Dan but I cant open that link
"My greatest problem lies in reconciling my net income with my gross habits"
Paul N
Posts: 481
Date Joined: 09/11/06
Hey Wilzee
have a look at this site
http://boatinfo.no/lib/library.html#
May be of some help
Cheers Paul
Wilzee
Posts: 93
Date Joined: 10/12/14
love your work Paul, found
love your work Paul, found the service manual on that site.
We will have to have a go at checking for faulty sensors.
"My greatest problem lies in reconciling my net income with my gross habits"