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#1
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Now, if you do happen to find it to be one of the sensors, be sure and determine if it is acting up when cold or if it is after the engine has ran a while.
If when cold, probably the sensor is bad. If after running a while, could be a stuck thermostat or blockage somewhere. If you have to change the sensor, do both of them and the thermostats also.
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 '75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny 
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#3
08-19-2008, 03:46 PM
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Quote:
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1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#4
08-19-2008, 03:47 PM
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FERM's right. All the horn, oil and sensor stuff is connected together and tripped by the ground. Any of these can be the culprit.
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny Last edited by tsubaki; 08-19-2008 at 04:21 PM.
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#5
08-19-2008, 03:49 PM
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The tach needs a pulse hot and a ground to operate. Depending how the boat was wired it could create a problem but I would expect it to be in reverse. Nothing working while disconnected
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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#6
08-19-2008, 03:55 PM
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I have no idea where the book to my motor is. Was gonna trace the path and color of the horn wire to see what we might have overlooked.
Does the horn come on with the key switched on or only when the engine is running?
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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#7
08-19-2008, 04:02 PM
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Quote:
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1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#8
08-19-2008, 04:06 PM
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Ferm, on the fuel restriction sensor, I should just disconnect the black wires?
__________________
1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#9
08-19-2008, 04:05 PM
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Basically, the way the horn sitiation works is a constant hot thru the key switch, the ground will be derived thru the 2 temp sensors and any of the VRO system. If any of them trip it sends the ground path from the motor block to the horn.
You may disconnect the VRO and not interupt the water temp portion and visa versa.
__________________
'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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