VRO WARNING HORN

[6408]

I have just purchased a boat with a 1989 v4 evinrude and it has a vro system on it.My question to anyone is where is the warning horn,is it in the motor or hidden somewhere else.I am very new to large motors and especialy to a vro system.also is the horn supose to sound when you first turn key on.Thanks for any help in this area.Thanks,Thanks.

 

[6408]

Re: VRO WARNING HORN

I also forgot to tell you that the 1989 evinrude with the vro system is a 110 hp.thanks

 

[ob]

Re: VRO WARNING HORN

gcon,the warning horn is within the throttle control box.Your engine model should have three alarms.One constant tone for overheat,rapid short tones for no oil from vro pump,and short tone every 30 sec. or so for low oil in reservoir.I believe the alarm test procedure for your engine is to turn the key to the "on" position and insert a key or similar flat metal instrument through the slot in the throttle controls that is just under the fast idle lever.When whatever piece of metal you used contacts the two points within the control box the constant alarm should sound.<br /><br />If your engine controls are of a later design ,the short tone verification alarm will sound when the key is turned to the "on" position.

 

[6408]

Re: VRO WARNING HORN

Admiral Thanks for that information i will test a little bit later.One more question,Are you able to see horn.Thanks once again.

 

[ob]

Re: VRO WARNING HORN

If your boat has the side mount controls you won't be able to see any part of it.It is encased within the box.

 

[6408]

Re: VRO WARNING HORN

Thanks very much Admiral.

 

[ob]

Re: VRO WARNING HORN

gcon,Once you have confirmed that the control box warning horn will sound you will want to perform one other test to confirm that the "all important" overheat alarm is working.Remove the engine cover and locate one of the temp sensor "tan" wires exiting near the top of the engine head covers.With the key in the "on" position peel back the insulating sleeve of the sensor wire and ground it momentarily to the engine metal.The constant alarm should sound verifying that the wiring from the temp sensors to the alarm horn are indeed working and making good contact.Good luck and keep us posted on your findings.

 

[6408]

Re: VRO WARNING HORN

Admiral once again thanks for the help. I found the slot under the fast idle lever and tested to see if alarm would sound and it did.The next test you mentioned about the temperature warning i did and when i ground that tan wire coming off the top of the head all i can hear is a faint tapping noise Coming from the throttle housing definately not as loud as the flat metal in the slot test i did.Any ideas? Again thanks.

 

[ob]

Re: VRO WARNING HORN

Probably a poor wire connection somewhere between the overheat sensors and the alarm horn or possibly a failing temp sensor.I would hasten to get it remedied as an inaudible alarm at running speeds in the event of an overheat is useless.Inspect the wiring at every terminal point and between the sensors and alarm horn for breaks in the insulation or chaffing.Also I would re-perform the tan wire test and make absolute sure that you are making a clean bare metal contact to ground.A poor test ground will reveal similar results. Good luck

 

[6408]

Re: VRO WARNING HORN

Thanks OB.You sayto to ground wire momentarily what happens if you ground it for to long?Thanks

 

[ob]

Re: VRO WARNING HORN

No worries.Just didn't want you to misunderstand what I meant and leave it grounded.That happened one time with another fella.

 

[6408]

Re: VRO WARNING HORN

Question OB.<br />Hope you have a minute to read a short story.I followed the tan wire from the brass sensor on the top of the head to the heat guage on the instrument panel at the helm.That clicking noise i told you about was not coming from the horn in the throttle box but it was the needle on the guage clicking up and down.Now the question is it possible that one of the previous owners disconect horn and connected to guage.I did find two wires laying at the bottom of each side of motor not connected to anything other than a rubber sleeve pulled over each of the two wires.When I ground eather of these two wires the warning horn sounds.(Took lucky quess and hoped I wouldn't short something out).Back to sensor on motor head.This sensor is brass and looks is shaped like a minature spark plug.Only one on the whole motor.Is this after market or is this the proper sensor and is there supose to be more than one? Thanks for the help OB.<br />Also I bought a service manual for this motor a week ago I wonder why it did not say anything about the slot under the fast idle lever?

 

[ob]

Re: VRO WARNING HORN

Sounds like previous owner may have disconnected both temp sensors and installed a temp guage and probe.I'm guessing that the two wires that you grounded and got the horn to sound were the original temp sensor leads.Can you locate the original temp sensor wires exiting the cylinder heads?

 

[6408]

Re: VRO WARNING HORN

Hi OB.<br />There is definately no other wires coming out of the heads.I phoned the fellow that I bought the boat from and he says he did not do anything to the heat sensors and also nothing to the whole motor .The boat always had the guage.From what you are saying there should be two sensors on the motor.I do see a whole that is in the top of each head.I wonder if that is where the sensors are suppose to be.The whole is on one side and in the middle of the two cylinders.How do the sensors fit into the heads.Thanks for all your help.

 

[DJ]

Re: VRO WARNING HORN

gcon,<br /><br />Sounds to me like someone installed the guage sensors where the horn sensors should be.<br /><br />Your only choice would be to replace the guage sensors, with a diffeent type and replace the horn sensors. If you want to go to that trouble, you would have redundancy.<br /><br />Otherwise, I would prefer guages. I would test their accuracy by borrowing a temp. sensing infrared gun.

 

[AUGIDAWG]

Re: VRO WARNING HORN

"ob" said, "Probably a poor wire connection somewhere between the overheat sensors and the alarm horn or,,,"<br /><br />My false alarm problem was getting worse over the weekend.<br />I went through cleaning every connector in the engine, and throughout the boat. At the horn, I found a bad butt connector crimp at the black wires.<br />I haven't had a chance to test yet, but I think that was the problem.