1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor off

[pschutz]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

My problem is a little different then the original post. I turn the key on and the alarm sounds just for a moment and all the lights come on one at a time while the system is going through the checks then they all go off. Start the engine and it runs for a few minutes then the overheat light comes on and alarm sounds for a few seconds then goes of but the light stays on. I've pulled and checked the t stats on pot of water they open and close fine, pulled the pop off valve and found that the seat was installed backward turned it around and put it back in. Checked for chaffed wires that may be grounding and loose connections all seem good. The water is getting to the t stats and the pop off valve. The engine is not overheating I checked it with a temp gun, when the light and alarm goes off the temp on both heads was 109deg. I'm thinking it may be in the temp swithches. Any other ideas?

 

[daselbee]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

Well, you are describing the proper operation of the Systems Check system regarding the overheat alarm.
That is exactly how it is supposed to operate. Alarm for ten secs, then the light stays on...just right.

Now, what is triggering it? With the Systems Check tach, your sensor wires are separated in the engine harness, and the individual wires go to the tach to trigger the alarm.

Long story short, I would look at the temp sensors first, then the wiring harness. So, find out which of the temp sensors is switching to ground and triggering the alarm. Disconnect one at a time, and when the alarm DOES NOT sound, that is the one that is causing the alarm. MAke sure you are taking the temp readings up on the head, right at the sensor. Try to hit the same place for both sensors, don't add variables by measuring the stbd side at the top of the head, and the port side in the middle...get me?

 

[bob johnson]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

I have never figured why I have that problem...but I havent put a ton of effort into it... I should try some of the advice given here... this past season my alarm was going off more and more...but I dont have an overheat condition....so i suspect the sensors are bad....

the problem with trying to trouble shoot it is this:

you have a very small window of time to test!!

2 minutes after turning the key the alarms sounds...10 seconds later it goes off...

you have to turn off the motor everytime you do a test and then you have to wait for that scenario to unfold to see if you found it or not..

my red light for heat stays on as well...

bob

 

[pschutz]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

Ok I will start there, I was checking the temps at the t stats. Do I go by the light or the alarm. If it is the alarm I will have to unplug one sensor then test it. Then try the other one and test it. If just the light is a good indicator then I should be able to do it all at the same time.

 

[bob johnson]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

Pschutz..... You tried the trouble shooting procedures we've outlined above?

Joe... Id like to put this to you....since me and pschutz have the same exact problem... I disconnted both my sensors by pulling the rubber boot connectors apart on each head... and I still get the alarm at 2 minutes, for 10 seconds and then it goes off till i turn off the motor and start again...then the same scenario happens all over.

it is absolutely not motor temperature related


maybe i am not understanding what triggers the horn on these sensors.

is the sensor normally grounded??? and then when it goes bad, it becomes UNGROUNDED, which sends the signal to the horn to sound?

or does the sensor go to ground WHEN it goes bad? and there is a totally other resaon i am having this issue

I think I tested these sensors according to the book in my kitchen 2 years ago and they both passed....

if i think a short someplace...i am thinking the horn would sound continuously!!! and not be so predicatable!!

thanks

bob

 

[Joe Reeves]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

Bob... Having a sensor ground out is what causes the horn to sound.

The sensors are:

Heat sensors (In cylinder heads)

Oil level (In oil tank)

Vaccum switch (A tee in fuel line between connection at hood pan and VRO. Smaller hose in tee leads to vaccum switch)

VRO (In circuit board within VRO)

(VRO Horn Warnings)
(J. Reeves)

NOTE: I retired around 1991/92. Possibly some of the later V4 engines and others may also incorporate a fuel vacuum switch that would enable a fuel restriction warning to sound as mentioned below, an unknown factor to myself.

1 - A steady constant beep = Overheating - The V/6 engines, possibly some others, have a fuel restriction warning which is also a steady constant beep.

2 - A beep every 20 or 40 seconds = oil level has dropped to 1/4 tank. (Late model engine = Every 40 seconds)

3 - A beep every other second = VRO failure, air leak in oil line, oil restriction, (anything that would result in a lack of oil being supplied to the engine).

NOTE - If the warning horn is the black plastic (overpriced) three wire type horn, the warning horn should beep once when the ignition key is turned to the ON position. If it does not, it is either faulty or someone has disconnected it (a stupid move!). At any rate, if it does not beep which indicates that the horn is non functional, find out why and do not run the engine until the problem is corrected.

 

[bob johnson]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

thanks joe....this is the V4 mid 90s and later 60 degree looper engine. it has the alarms you mentioned MINUS the fuel restriction alarm.

this motor has the VRO plugged off and the oil tank removed....the plugs for it just hang in the engine and not connected to anything.

wouldnt the fact i disconnected both sensors from the wiring harness say that when this alarm goes off...it cant be from those sensors?

this issue happens 100% of the time on schedule...2minutes after starting motor the alarm goes off the red light on the tach for HOT lights and the alarm sounds for 10 seconds....never longer never shorter....the motor is not in over heat mode though...i have dual temperature senders to dual temp guages and have also used an infared thermometer to verify the temps.


once I had the alarm go off while running because of an over heat issue and the motor went into SLOW mode. There was some debris that clogged the intake screen.... so that scenario is different than what I am describing...that happens EVERYTIME i start the motor...even if i start it every 10 minutes....the process starts over again......no realtionto the actual motor temps

i waonder if it could be a signal that it isnt getting info from the VRO pump.....BUT that alarm is supposed to be a patterned beep....not the constant 10 second sounding I get.. also if the temperature sensor did send an alarm for over heat...it wouldnt turn off on its own after 10 seconds....it would turn off when the temp falls or I turn off the motor...right?

I suspect it isnt a short.....because once it does it...it doesnt do it again.....until after I **** the motor and key off and start it again

thanks

bob

 

[Joe Reeves]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

I retired in 1991 and strongly suspect that a major change has been made in the circuitry of the engines that I'm not aware of. What you're saying in effect, if I'm not mistaken, is that you have all of the sensors disconnected and the warning horn is still coming on (sounding). If so, there's a circuit there that escapes me. Hopefully a knowledgeable member who is aware of that circuit will jump in here with the answer you need.

 

[Wmocarsky]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

have a problem similar to another posted under the 'alarms' formum.

When I turn the ignition key to one (before cranking motor) the alarm horn sounds continuously. When I start the motor, the 'system check guage' never attempts to cycle through its lights (no lights ever light).

With the key just 'on':

I have checked the ground (tan wire) on the alarm horn - it does not go to ground. When I jumper the +12V to the alarm horn disconencting the tan wire - horn doesn't sound - so assume horn OK

At the connect to the alarm horn, I have 'looked back' towards the motor. The return wire (not +12V) has some continuity to ground, but it shows some resistence.

Can the 'system check guage' be bad and cause this?

If someone can tell me where the temperature/oil sensors are, I can check them. If there is only 1 wire on them, should it be ground? If 2 wires 1 ground 1 not?

If it is not any of those other than a shorted wire - could it be the control module (I HOPE NOT).

Thanks for any suggestions



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[Wmocarsky]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

I have a similar problem as original issue with 2004 115 4 stroke

When I turn the ignition key to on (before cranking motor) the alarm horn sounds continuously. When I start the motor, the 'system check guage' never attempts to cycle through its lights (no lights ever light).

With the key just 'on':

I have checked the ground (tan wire) on the alarm horn - it does not go to ground. When I jumper the +12V to the alarm horn disconencting the tan wire - horn doesn't sound - so assume horn OK

At the connect to the alarm horn, I have 'looked back' towards the motor. The return wire (not +12V) has some continuity to ground, but it shows some resistence.

Can the 'system check guage' be bad and cause this?

If someone can tell me where the temperature/oil sensors are, I can check them. If there is only 1 wire on them, should it be ground? If 2 wires 1 ground 1 not?

If it is not any of those other than a shorted wire - could it be the control module (I HOPE NOT).

Thanks for any suggestions



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Just added engine type

 

[Wmocarsky]

Re: 1995 johnson 115 Ocean runner Alarm when key is turned to on position w/o motor o

Found the issue with the 2004. Turned out to be the check system gauge. When I disconencted the connector to the gague an looked back into the wires towards the motor, all was OK on +12v and black was ground - all others were open - just as they should be. The wires to the alarm were ok to. So purchased a new gauge and everything is OK