NO OIL alarm?

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Greetings and salutations,

I have a 95 Evinrude 150 and I think it's trying to sound the NO OIL alarm. I was out running with it yesterday at about 30mph and I noticed a faint tick-tick-tick-tick coming from under and to the right of the steering wheel area where the throttle is (it's a bass boat). The pace of the tick is kinda fast - two to four per second.

At first I thought it was my depth finder acting up. I shut all that crud down and it still continues. Then I noticed it was not as much of a "tick" as a squelched "beep". Once I noticed this, I dropped off plane, shut it down and started checking things. I check my info sticker - the closest pattern to this is the NO OIL alarm (continuous short beeps). The bulb coming from the oil tank is firm - very firm, and I find nothing obvious (like an empty oil box) so I fired it back up and let it idle. No beeping. I'm a good bit from shore so I decide to just idle back in until I'm close enough the trolling motor can take over if needed. I get back to a safe point and I bring the boat back up on plane - about 20mph. The ticking/beeping starts again. It becomes more obvious that it's not a tick but rather a beep. It also appears that the sound level of the beep is directly proportional to the the RPM's of the motor, but I could be adding detail to a stressful situation that wasn't there.

The sound level of the alarm is *very* weak. I have freaky good hearing, and I had to focus on the sound to hear it. It's not the fire alarm wake up the dead noise that horn has made in the past. The horn correctly beeps nice and loudly when the ignition key is turned. I've heard the low oil alarm in the past - it was LOUD. This alarm isn't very loud at all. I suppose the horn could be going, but it does seem to work. Is there a test for this I can perform?

My first thought is that there is an oil flow restriction, but I don't know where to start. I presume there is an oil filter, but I can't find it. Where is that sucker? While looking for the filter, I took the hood off the motor and looked for obvious problems. I didn't find any broken hoses, but I did find something on the front of the front of (what I think is) the oil pump. Some kind of electronic block that has the cover broken over:

DSC_2622.jpg


I moved the cover back over it so that it is now covered, but what is that thing, and does it need fixin?

DSC_2623.jpg


This is a photo of the front of the motor. There was a little oil laying around, but it wasn't substantial. There was a little oil puddled up at the front of the carbs - is that normal? Also, there was a little more oil on the oil supply line than I thought should be there, but I'm the exact opposite of an expert regarding these things....

I sure would appreciate any help with this. I just spent $400 at the shop and the wife is going to smack me if I have to dump a lot more right now...

cheers and thanks for any advise,
Chris Curran
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

OK - I think I found on another thread that the oil filter is in the oil tank. I don't think I would have ever thought of looking there!

I grabbed the proper Torx wrench, and tried to open the oil tank. It didn't budge with a bit of force, so I stopped - not wanting to strip anything. How much torque should be needed to remove those torx bolts?

Also - The oil line bulb is still very firm - does that indicate pressure in the oil line? If so, how do I bleed it?

thanks....
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

More info...

Here's a pic of the top of my oil res:

_DSC2626.jpg


Those are the torx bolts I was referring to in the previous post... Should I "muscle" them off or is there a trick to this?

Since I haven't yet removed those torx bolts, I can't inspect the internals up close and personal. So, I dumped the oil (it was close to full) and took a peek inside:

_DSC2624.jpg


It's very clean in there. No white goo, no sludge. The "sock" (if that's what's called) looks real clean too.

I went ahead and mixed the remaining fuel in the tank with enough oil to be a 50:1 mix....

Ideas, comments or jests welcomed....

cheers & beers,
Chris
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

Sorry folks... I hope I'm not being a pest....

I found this link in another thread here:

http://continuouswave.com/whaler/reference/VRO.html

So, it seems that electronic widget at the front of my motor with the broken cover is the NO OIL circuit. Since it has the broken cover, and the tank seems clean & clear, I'm starting to suspect it's the culprit. Here's another (better) view of the NO OIL circuit as it sits in my motor:

_DSC2627.jpg


When I first took the front cover off, this had quite a bit of oil in it. Is that normal? This is another view from the other side, showing the broken cover (yellow circle):

_DSC2628.jpg


I can see that there is a foam seal in that lid - I presume it's there to seal something in/out, but it's obviously not doing it's job...

That's it for now. I'm going to go drink some beer and watch the Talladega race....

cheers!
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: NO OIL alarm?

You seem to be solving your own issue nicely, ;)

The first thing that you will need to determine is if your warning horn is functioning properly. The closest I can determine to what you are hearing is the No Oil (sensor in oil portion of oil pump), which is intermittent rapid short tones. Although you state that the horn will beep on start up, indicating that it is working. Will the 'beeping' stop if you pump the primer bulb? What about disconnecting the TAN wire? Will grounding out the tan wire cause an alarm?

Those torx bolts will come out, just need to 'crack' them.

Also check the ground wire out on the horn, is is clean and tight? No nicks or cuts?

Is it the small black plastic horn that has a built in black ground wire? If so the TAN wire must be attached to the terminal closest to that black wire. If it is not strange happenings will occur like you mention.
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

Will the 'beeping' stop if you pump the primer bulb?

No (and note that the bulb is already *very* firm).


What about disconnecting the TAN wire?

From where? At the oil pump?


Will grounding out the tan wire cause an alarm?

As above...


Is it the small black plastic horn that has a built in black ground wire?

I don't know where the horn is. It sounds as if it's tucked up in the body of the boat and not real sure how to extract it without tearing anything up... I'll go hunting.


thanks!
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: NO OIL alarm?

The warning horns are not very loud, but yours sounds like it is near the end of a useful life; the critical overheat alarm and fuel obstruction alarm require that you be able to hear it.

The electronics in the OMS oil side of the system are not serviceable. The pump should be replaced unless you want to disable the system and go 100% premix.
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

The electronics in the OMS oil side of the system are not serviceable. The pump should be replaced unless you want to disable the system and go 100% premix.

Thanks, but I didn't think anyone was talking about servicing the OMS system (at least I'm not). Why do you think I should replace the pump at this juncture?

cheers
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: NO OIL alarm?

The horn is located in the remote control. You will need to remove the cover to access it. I would start there.
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

The horn is located in the remote control. You will need to remove the cover to access it. I would start there.

Thanks. I'm not sure what you mean by "remote control". Are you talking about the throttle mechanism in the console?

Lastly, as you can see in the photo's I've already taken the cover off the motor. Two of them in fact. Or are you referring to a different "cover"?

PS: more details on the TAN wire advise earlier please...

tia...
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: NO OIL alarm?

Sorry the 'remote control' refers to the box with the throttle controls and key switch. It sounds as if your horn may be bad or you have a bad ground there. The cover that I was referring to was the cover for the remote control.

remote control.jpg

The TAN wires are connected to various components on your outboard, such as Heat Sensors, VRO, Vacuum Switch if so equipped, Oil Tank, etc..., but are all part of the same 'system'.

IF the alarm sounds on start up, and If by disconnecting any of these wires and the alarm stops, you have found your faulty component.
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

The cover that I was referring to was the cover for the remote control.

10-4.

The TAN wires are connected to various components on your outboard, such as Heat Sensors, VRO, Vacuum Switch if so equipped, Oil Tank, etc..., but are all part of the same 'system'.

Thanks. Earlier you asked if I had grounded the TAN wire (I hadn't). What exact procedure are you referring to? Pull the TAN wire off the oil pump, then short it to ground, or, pull the TAN wire from the console and short it to ground, or...

Lastly, since I have now mixed oil into my tank (@50:1, shaken, not stirred), I can now start the motor, let it run, try to reproduce fault with NO OIL alarm without damage to the motor, eh?

cheers
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

Sorry the 'remote control' refers to the box with the throttle controls and key switch. It sounds as if your horn may be bad or you have a bad ground there. The cover that I was referring to was the cover for the remote control.

I knew this would get complicated... Here's a pic of my "remote control":

_DSC2630.jpg


As can be seen, my remote control is surface mounted to the body of the boat. There doesn't appear to be an obvious way into that setup - there's one screw, but the handle will have to come off to get the cover plate off. I dunno how to get that handle off... Further, I run with a HOT FOOT device, so there's no telling how it's been re-worked in there by the dealer. All I use that thing for is to put it in/out of gear - throttle control is done with the foot.

Before I go ripping a ton of wire and rigging out of the boat to find a horn, I'd much prefer to perform the TAN wire test. However, I don't want to go grounding wires without a clear understanding of the procedure. I've learned from experience that blue smoke and wiring is NOT a good combination.... :)

TAN wire test procedure please?

tia...
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: NO OIL alarm?

Turn your ignition switch to the run position. Disconnect and ground the ignition switch side of the tan wire at one of your cylinder heads. You should get a constant alarm, letting you know if the horn is loud enough to be heard while running.

Remote control is a generic term for dozens of different types of throttle/shift mechanisms. In some cases the ignition switch and horn are attached to them but many other setups have them in the console. The horns are almost universally wired close to the ignition switch where they get their positive voltage.
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

Disconnect and ground the ignition switch side of the tan wire at one of your cylinder heads.

Thanks bunch... sorry to be a pest, but what do you mean by "ignition switch side"?

In some cases the ignition switch and horn are attached to them but many other setups have them in the console.

I just crawled up under the console and found it - kinda hanging out in the open after you find it. :) The wire connections appear OK, but I needed to change glasses and get back under there to inspect again...

thanks again...
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: NO OIL alarm?

"...what do you mean by "ignition switch side"? "


At the temperature switch on each cylinder head the tan wire has a disconnect a few inches down the wire. Once you separate the two pieces of wire, ground the section of wire running to the ignition to close the circuit and sound the horn.
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

At the temperature switch on each cylinder head the tan wire has a disconnect a few inches down the wire. Once you separate the two pieces of wire, ground the section of wire running to the ignition to close the circuit and sound the horn.

Thanks. The horns blares loud and clear when I short the TAN to ground... That NO OIL sensor I photo'ed earlier with the top flopped over... Is it normal top have oil pooled up inside it (where the top is supposed to be)? Could that pool of oil cause it to miscount the ticks?
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

OK, we've determined that the horn isn't broken. It's loud - very loud. The sound I was hearing was 1/10 that volume. What next? Is there a way to test the oil pump? What about that oil res bulb being firm? How do I bleed that pressure off? What about that NO OIL circuit?

tia..
 

ccurran

Cadet
Joined
Apr 25, 2008
Messages
24
Re: NO OIL alarm?

Well, I guess no one has anything else to suggest, so, I suppose I'll drag her back to the dealer.....

thanks anyway...
 
Top