98 Evinrude 225 Ocean Pro E225TXECS Alarm Buzzer

[enijjer]

Hi

I was wondering if anyone could provide me with a schematic/wiring diagram for the alarm buzzer on the E225TXECS engine? Something that shows what all sensors will turn the alarm on.

I am currently having an issue where the alarm will go off randomly while out boating. Some times it kicks on right when I start the engine and other times when I am on full plane. It emits a continuous beep any where from a few seconds to up to 30 seconds. Other than the alarm going of randomly the engine runs great. Water pressure is good and temp gauge says engine is in the normal operating region. Another funny thing is that the alarm seems to only go off while the boat is in the water. When I put the earmuffs on to flush the engine at home I cant get the alarm to go off. I disconnected the oil level sensor from the engine and the alarm still goes off so I know its not the oil level sensor. Also I recently switched over to the walmart brand oil. Does any one think this would cause the alarm to go off? Is there some kind of oil flow sensor as well? I currently have the SELOC manual but the wiring diagram in there is not the greatest. What I am hoping to do is disconnect each sensor one at a time and see if the alarm buzzing stops. If it does then I know it was that sensor and it either needs to be replaced or there is a real problem that needs to be addressed. Any help you can provide would be very much appreciated. Thanks!

E

 

[daselbee]

Re: 98 Evinrude 225 Ocean Pro E225TXECS Alarm Buzzer

You have the Systems Check system and tach.

The way it is supposed to work is if any tan sensor wire goes to ground, the associated warning light in the tach will light up and the alarm will sound for ten seconds, then go off.
When testing, key on, you can manually short each sensor line to ground, and the associated light will turn on in the tach. The alarm WILL NOT SOUND, unless the ENGINE IS RUNNING. The tach needs the tach input signal to enable the horn to work.

You are supposed to look at the tach lights to see whether it is an overheat, low oil, no oil, or check engine (fuel restriction) fault.

I would do just that...look and see which light is lit when this fault occurs.
It will give you a starting place.

The sensor wires at the engine ALL attach to the boat harness in one plug that is under the plastic electrical cover on the mid port rear side of the engine.
There are three big connectors there...you will notice that one of them has six wires, four of them being tan with color stripes, one grey, and one black.
The tan ones are your sensor lines from the engine. The grey one is the tach signal. Black is ground.
Tan is overheat, tan/black is low oil (oil tank), tan/yellow is no oil (OMS pump), and tan/orange is check engine (fuel restriction) (fuel line vacuum switch).
It will not hurt to run the engine with that plug disconnected while testing. Just be aware you will not have any warning system at all.

The other end of these wires all go thru the boat harness to an 8 pin plug that attaches into the back of the tach.

This will get you started.

 

[enijjer]

Re: 98 Evinrude 225 Ocean Pro E225TXECS Alarm Buzzer

Thanks Dasalbee for the quick reply. I was finally able to get out this ofternoon and play around with the boat. Here is what I found:

1. There is no harness connecting to my Tach. - I guess whoever had the engine installed decided not to add the special tach.

2. I did fid the 6 wire connector underneath the plastic cover on the engine. I traced that up to the top on the engine where it connects to some kind of processor module. I was not able to find the other end of this harness inside the center console.

I was reading in the SELOC manual that my engine has the SLOW feature that would engage if either of the temp switches grounded. Since my RPMS are never effected I believe I can rule out the temperature switches. I have also ruled out the oil level sensor since I disconnectd it and the buzzer still went off. That leaves the "No oil" sensor and the "fuel restriction" sensor. My primer bulb has been hard to prime lately and after I start the engine the bulb gets really soft and has air in it. Do you think this could be causing the issue? I dont seem to be having any difficulty getting to 5600 rpms so it doesnt seem like the fuel is being restricted?

Or could it be the no oil sensor? where are these 2 sensors located so that I can disconnect one at a time and se if the buzzer stops buzzing? Thanks for your help and sorry for such a long post.

 

[ezeke]

Re: 98 Evinrude 225 Ocean Pro E225TXECS Alarm Buzzer

The 225HP motors have a vacuum switch attached to the fuel line near the fuel pump; it has a black ground and a tan wire leading to the engine harness. When the vacuum switch senses a fuel obstruction, it sounds the constant alarm.

The fuel obstruction alarm is distinguished from the overheat alarm by not activating S.L.O.W. because of a blocking diode between the vacuum switch and the powerpack.


The cause of the fuel obstruction is before the fuel pump, often found in the fuel pickup screen, anti-siphon valve, dirty fuel filter or blocked tank vent. It can also be caused by a bad primer bulb.

 

[UWDiver]

Re: 98 Evinrude 225 Ocean Pro E225TXECS Alarm Buzzer

The 225HP motors have a vacuum switch attached to the fuel line near the fuel pump; it has a black ground and a tan wire leading to the engine harness. When the vacuum switch senses a fuel obstruction, it sounds the constant alarm.

The fuel obstruction alarm is distinguished from the overheat alarm by not activating S.L.O.W. because of a blocking diode between the vacuum switch and the powerpack.


The cause of the fuel obstruction is before the fuel pump, often found in the fuel pickup screen, anti-siphon valve, dirty fuel filter or blocked tank vent. It can also be caused by a bad primer bulb.

I'm having the same problem with my '97 225 Ocean Runner. I'm pretty sure my problem is the switch. When I tap the connector to the vacuum switch, the light goes out or flickers. I bought a new vacuum switch and it's on its way via the big brown truck. Does the old one just pull out? I'm not sure how to replace it. I hope I don't have to pull the fuel pump off...

 

[enijjer]

Re: 98 Evinrude 225 Ocean Pro E225TXECS Alarm Buzzer

Just wanted to give every one an update on my alarm problem.

Based on every ones comments I started to poke around the fuel system. I visually inspected my inline Racor water separator/fuel filter. All looked well with it until I grabbed a hold of it and tried to twist it off. The darn thing pretty much crumbled in my hand. Rust had eaten up the back side of it and this could not be seen through a visual inspection. Need less to say I replaced the Racor filter. Took the boat for a test ride and the frequency of the buzzing has gone down dramatically. It only buzzed twice while at idle. prior to replacing the racor it would buzz intermittently while at idle or full rpm's. At this point I am thinking of replacing the factory fuel filter that is close to the engine. I am speculating that some small particles from the rusted up Racor may have made it to this filter and are now causing problems there. I'll keep you posted.

E