| Author |
Message |
    
William Wolf
New member
Username: wolfpch
Post Number: 1
Registered: 07-2009
| | Posted on Saturday, July 18, 2009 - 07:16 pm: | 
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The alarm is sounding on my 1994 115 and it is the one attached to the ignition harness. It started when I was towing a tube and now it stays on constantly. If I start my boat the next day it come on right away. I disconnected the two blue wire from oil res and it still sounds. I have blue smoke and water is coming out of top hole so pump is working. any help? |
Graham Lamb
Senior Member
Username: galamb
Post Number: 5709
Registered: 05-2007
| | Posted on Saturday, July 18, 2009 - 09:51 pm: |
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That's an overheat alarm - so either your sensor is shot, you have short in the wiring somewhere, the alarm itself is busted, or it's really overheating. |
William Wolf
New member
Username: wolfpch
Post Number: 2
Registered: 07-2009
| | Posted on Sunday, July 19, 2009 - 01:17 pm: |
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water is coming out of top hole and is not hot. If I start the boat right now the alarm will sound constantly. Any thoughts and that is after the engine has sat a couple of days. |
Graham Lamb
Senior Member
Username: galamb
Post Number: 5727
Registered: 05-2007
| | Posted on Sunday, July 19, 2009 - 01:42 pm: |
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If you look near the top of the head, just below the thermostat and poppet cover you should see a black wire coming out.
That is the temp sensor. Follow the black wire down to a little terminal block (a little two post thingy that will have a few wires going to it - another black, a tan, a blue/tan etc).
Undo the post and remove that black wire that is feeding from the temp sensor.
If that cures your problem, then the sensor is shot (quite a common issue). If the horn continues then you know it's the alarm module itself that is shot. |
William Wolf
Member
Username: wolfpch
Post Number: 4
Registered: 07-2009
| | Posted on Monday, July 20, 2009 - 10:55 pm: |
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I could not find what you are referring to. About even with top spark plug to the starboard side is a brass plug Temp Senor? with a tan wire coming out. I disconnected and alarm still sounded but I am not sure if I was in the right area. The back of the motor where spark plugs are is what I was working with. |
Graham Lamb
Senior Member
Username: galamb
Post Number: 5760
Registered: 05-2007
| | Posted on Tuesday, July 21, 2009 - 09:31 am: |
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Sorry, steered you wrong there. That is the temp sensor for a gauge, not the overheat sensor.
Try this. From (looking at the prop end), look on the right side of the powerhead. You should find a sqare box on the side kinda in the open (easy to see). It has two blue wires, a tan, a black and a purple wire going to it.
Follow the black or the tan wire back to a little two post terminal.
At the little terminal, one of the posts should have the tan that you followed, a tan wire with a blue stripe and a black wire all ganged together. If you remove the black wire there (and just reconnect the tan and tan/blue) you will have disconnected the overheat sensor... |
