Warning Alarm for VRO failure? 1995 150 EXEOM

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

Haffiman, I have a good feeling about this. So then the only alarm I will have will be vacuum and overheat? Whatever they may sound like. Thank You for all of your help.

 

[Haffiman]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

Just a short add-on.
After filling oil in the fuel tank:
Depending on the length of fuel line from tank to engine, it might be a good idea to disconnect the fuel hose from engine and use the primer bulb to pump fuel (into a canister) until you see fuel colored with oil coming out, then re-connect the hose to engine.
This will ensure 2% mix in the engine from first start.
This is in fact contrary to when running VRO pump, when you use the primer bulb you are in reality pumping pure fuel without oil into the carbs. Will normally not do any damage as is just 'one carb', but anyway.

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

Haffiman, Am running premix now, but thanks.

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

Haffiman, So I can unhook the big plug system check multi wire into the tach, leave the grey wire in place, my alarm will still work? as well as the tach? but the sytsem check lights will no longer function?

 

[Haffiman]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

The System Check horn and instruments are matched, the driver is in the instrument in the System Check, but in the horn in the old system.
To get it working properly, you need to attach an 'old' type horn to the Brown alarm lead. Pull the lead out of the big contact, and connect to an old horn. (verify correct lead by ohm test from a temp switch).

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

With an OEM harness adapter which is supposed to adapt a pre system check engine and harness (1995 and older) to a system check dash configuration tach and prewired binnacle(96 and newer), which horn is used? an older( logic in horn) presystem check horn or a newer (system check logic in tach )horn? ? I will be taking out my binnacle tomorrow to check the part # on the horn now installed. Perhaps it was replaced by the previous owner with the wrong horn. I would think that with an OEM OMC adapter there is a certain functionality designed into it. Or is it just designed to just make the tach (not the warning lights) and the horn(older style) function? Is an older (pre system check )horn part of the adapter setup?

 

[Haffiman]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

When the System Check was introduced, they ran into trouble with some engines not delivered with the System Check instrument, rev-counter or the round Sytem Check gauge. Those engines, 9.9/15 and 25/30 was delivered (retro fitted) with a special horn driver box in order to make the System Check alarm horn work properly.
Not having individual leads from sensor/switches to the instruments all the way will somewhat 'confuse' the system check alarm indication.
An old VRO tank as well as No-Oil will give a constant alarm, same as temp and fuel-restriction, not quite sure which light will be triggered, but in all cases the same light. A system check VRO oil tank in an old system, will give a constant alarm like Temp alarm. Which horn you have may easily be identified as the old horn should be a 3-wire, the System Check a 2-wire with a 12" extension cord and a Deutz contact in the end strapped somewhere under your panel.

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

Would I be best to just find the single tan wire running in the original harness before the system check adapter splice into it and install a seperate pre system check horn?

 

[Haffiman]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

In your engine harness (red plug) it is a single Tan alarm wire.
In the conversion harness between your red plug and the boat harness, it should be possible to 'Ohm' out to which pin in the big (12 pin) contact this lead is connected.
Then take that lead out of the big contact in the rev counter end and connect to an 'old' type horn.
I have used some of the conversions from 'old instruments' to System Check engine, but never the other way around as it got too 'messy' on the engine side and the kits was almost as expensive as a complete re-wiring.

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

Haffiman, I refer to post #27 second paragraph. This is exactly what I have been experiencing. My alarm (steady beep not short beeps) sounds and the hot light on the tach lights up. The beep will stop after a few seconds but the light will stay on . I will shut down the engine and restart and the light will be off. So due to the conversion it is likely that only one alarm will sound no matter what the issue, meaning that the overheat alarm will sound the same as no oil, low oil , vacuum or VRO failure and only one light(the hot) will light up. I have been taking the temp when the light lights up and alarm sounds and verified that there is no overheat issue. I do believe that my VRO may be failing due to low oil consumption during my last outing and others before. If so this may actually be the issue. There is a problem but the alarm signal I expect is not the one I am receiving. So due to the conversion I will only receive one type of alarm no matter what the issue is? Now I am guessing that if I unhook the electrical part of the VRO and run on premix and get no alarm that my system is working and I have a bad VRO. Would a VRO failure be intermittent? Sometimes pump correctly and sometimes not pump? Look forward to your reply as I have all of them. Thank you again.

 

[clanton]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

You still need the diagrams? Scanner is now working and table is covered with OEM manuals and diagrams.

 

[clanton]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

If you are going to disconnect the VRO and oil tank, there is one more way to wire the alarm, using the late model horn which is a better horn.

Removing the VRO system leaves two sensors systems, overheat and fuel restriction.

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

Clanton, I would like very much to have diagrams as I do not know how this will end. Thank you for your kind gesture.

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

Had the oportunity to check some part numbers and do some test.
Binnacle harness and horn all 1996 and newer.
Sensor test:
temp sensors engine side grounded to block- continuous tone- hot light on tach lights up.
vacuum sensor engine side tan grounded to block- continuous tone - hot light on tach lights up.
oil tank engine side tan grounded to block - continuous tone - low oil light on tach lights up.
VRO pump tan engine side wire grounded to block- continuous tone- hot light on tach lights.
So I guess I have lost the toned short and long beeps of the 1995 which have been replaced by one continuous alarm no matter what the problem.
I am guessing my VRO pump is failing. I have started another post regarding this.Tomorrow I will be going out with the VRO wires disconected, I will be running on premix and do not expect any issues. I will post the results.

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

So I finally got out on the water. This time with the VRO wiring plug disconnected, oil line still hooked up also running premix. Used almost no oil at all from the reservoir but the alarm did not sound. Had I not been running premix my motor would have seized up.
Remember this is a 1995 engine on a 1996 boat with a 1996 engine harness adapter up front to match a system check tach and binnacle control. I do not know if the 95 harness and the 96 adapter is supposed to function as would a 96 engine and system check system with the sensors lighting up corresponding light indicaters on the tach but mine does not. On my adapted setup if there is a problem only the hot light will illuminate and only one long beep alarm will sound for about 20 seconds or so. Apparently my OMS VRO pump has failed, no oil to the engine but only one alarm and the hot light are triggered.
I offer sincere Thanks to all of you for the help provided in this thread. I believe the issue can be put to rest in my head . Been nagging me for years and cost me a rebuild on the engine. I do not know how many more boats have mixed systems on them but do hope this thread will help the owners that have tried to make sense of their alarm problems.
Last but not least if your alarm goes off run premix . Thank you all again.

 

[seahorse5]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

When you said earlier that you found the splice that modified your red plug wiring to fit the 96 boat wiring, was it 3 factory connectors that plugged into the wiring or was it a mass of crimped connections, possibly wrapped with electrical tape, that someone cobbled together?

That makes a big difference in how your alarm system works

 

[w2much]

Re: Warning Alarm for VRO failure? 1995 150 EXEOM

It was the 3 factory connectors. Looked or looks good but the horn is the newer type w/o logic, logic being in the tach.