1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

[Piece715]

Let's start with the wire. I am unsure of where I need to hook the free end of this dual wire. I am going to try to explain it to the best of my ability. If you need clarification please ask. Thanks in advance!

Ok here is the better picture of the wire that has no connection... ... Here is a closer one... ...The RED arrows point to one half of the wire that enters a bundle. The bundle seems to come together and enters the plug for the throttle control. The GREEN arrow points to the bundle. Its not the rubber looking one in front but behind that is another bundle with some electrical tape. Now a wire of the same color comes out of the bundle and heads up past the plugs also indicated in RED. I'm thinking that the cream colored wire was tucked into that bundle to take up the slack but I could be wrong, it could be spliced in there. The PURPLE arrows indicate the other half of that wire, which appears to be a ground. The wires are just split off one wire and this wire runs with the throttle plug cable down the side of the motor and out the back where it remains unattached at the moment. This wire is indicated in BLUE. (picture on next post; sorry about the separate pages but it is the same picture from post #494)

Here is the only wiring diagram for my motor from my Clymer Manual ; 1985 Evinrude/Johnson 40 & 50 HP

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

This shows how the wire runs out the engine. It has two ends and they are not attached to anything... should this go to the ground and positive bus or pigtailed into another wire?! The wire is outlined by BLUE box and the RED box indicates where the wire originates

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

Now moving on... Last night I replace the impeller. Lower unit came out with ease... more heft than originally thought btw. Once off and on initial inspection I notice a silver tab in the top of the water pump housing next to the water pump shaft. I touch it and it moves easily. I pick it up and this is what it looks like.... ..... The tab is super sharp and looks like it has been sitting in there forever, its extremely worn... ... I'm guessing that shouldn't be there?!

jbcurt looked up the part for me and this is what he found:

W/ part #319967 for Evinrude OB, this is what came up:

	0319967 - RETAINER TRUNNION
List Price $XXXX Part Number 319967	Your Price $XXXX Manufacturer Evinrude Johnson OMC CURRENT

Does anyone know what this is suppose to retain?!

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

Last question pertains to the exhaust gasket. Apparently a while back someone installed the lower unit incorrectly and the gasket was pinched. It looks as if it has been this way for a while as the gasket is very warped and slightly melted. Do I need to replace this so it seats correctly?!


Thanks again for any help! Much appreciated!

 

[hidef]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

The tan wire is a temp sensor and should set the warning horn off in the controls if the engine is overheating. As for the part that was caught between the shaft and water pump housing I have no idea where that would have come from.

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

The tan wire is a temp sensor and should set the warning horn off in the controls if the engine is overheating. As for the part that was caught between the shaft and water pump housing I have no idea where that would have come from.

Thanks you so much for the reply hidef!!

So where and to what does the end need to be attached? its just hanging out the back of the motor at this moment...

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

Through some searching right now I found that the retaining trunnion is from the intake manifold and primer system.... Here is the diagram from the Evinrude site... It is #20...

... This doesn't seem good... Suggestions?! HELP :facepalm:

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

Here is the diagram for the Seal, Gearcase, inner exhaust... It is #47... Guessing this should be replaced?!

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

Ok was doing a little more digging through that diagram for the retaining trunnion. The trunnion attaches to what is the anchor block and the only thing on that side of the motor that matches that description is the block that holds the throttle cables. Which means the retaining trunnion is the piece that keeps the throttle cables in the block. Ever since i have had the motor that piece has never been there. It has always been an over sized black washer. I guess I now know what happened to the original piece.... No need to purchase this piece as the washer has been working well for years with no trouble. If I am incorrect please let me know. I am doing this from memory of the interior of the motor... i will double check my thought process when i get home.


Does anyone have any idea to how the free end of the temp sensor wire needs to be attached?!

 

[CatTwentyTwo]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

My manual covers the 84 model year motors so I'm not certain that it's the same as an 85 but most likely it is. It shows the tan wire going into a large red connector on the motor and from there to the over temp horn which is probably up at your console.

 

[mark1961]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

Yep, it connects straight to the hot horn inside the control box......the rest of that wire should be there somewhere in the main wiring harness back to the controls.

Could it be someone has cut it to shut the horn up? Only one way to find out......

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

My manual covers the 84 model year motors so I'm not certain that it's the same as an 85 but most likely it is. It shows the tan wire going into a large red connector on the motor and from there to the over temp horn which is probably up at your console.

Appreciate the info ryoung! When I traced the wire that's where it looks as if it leads...

Yep, it connects straight to the hot horn inside the control box......the rest of that wire should be there somewhere in the main wiring harness back to the controls.

Could it be someone has cut it to shut the horn up? Only one way to find out......

Thanks mark! Looks like I need to undo the bundle and see how that wire is splice in there.. and if it even still goes back to the throttle. The thing is that there is no wire hanging out of the throttle, its completely sealed with the normal plugs on the outside. I don't know why someone would splice into the wire and have an end running out the back of the motor. This is very confusing to me. If it's still connected to the red throttle connector then i should be able to snip off the ends of the wire and just seal them up seeing that the connection would still be there. Is there a way to test to see if the hot horn is working?! Any suggestions on what I should do?!

 

[mark1961]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

Thanks mark! Looks like I need to undo the bundle and see how that wire is splice in there.. and if it even still goes back to the throttle.

No reason to think it isnt still there and wired back to the helm.....best place to look is either side of the large red plug on the port side of the motor.....if you have an identical wire either side chances are its wired back to the overheat horn.

Is there a way to test to see if the hot horn is working?! Any suggestions on what I should do?!

Its usually done by disconnecting the knife connector under the rubber sleeve near the sensor end, turning the ignition on and shorting out the end that is wired back to controls against the engine block.....that wont work for you though until you track down the wire.

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

No reason to think it isn't still there and wired back to the helm.....best place to look is either side of the large red plug on the port side of the motor.....if you have an identical wire either side chances are its wired back to the overheat horn.

Ok so I'll deal with testing once I find out if the wire is still connected to the red plug... I'll post some more pictures when I get out there tonight. hopefully when I undo the bundle I'll find that the tan wire still feeds into the plug and that the wire that is just dangling there is just spliced into it. Question to ponder: WHY would someone splice into that wire if it was still wire to the helm?!

Keeping fingers crossed that its all still wired correctly and ill just be able to just cut out that additional wire... :redface:

Thank you for ur help mark much appreciated... I'm sure ill have a couple of more questions as motors are new to me. Just did my first impeller change the other night and it went fairly well as far as the water pump is concerned. The J.A. that supposedly overhauled my water pump the last time apparently didn't put any anti-seize or grease on my trim tab plate bolt and it sheared with 1 turn of the wrench. And seeing that the retaining trunnion was so worn that it can be assumed its been there for a WHILE and the motor has been sitting on an engine stand since I'm guessing he didn't even bother with the water pump as the retaining trunnion would have fallen out once the housing was removed... but i definitely got charged for it! So gonna attempt an easy out before finding a machine shop for the bolt.

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

So my buddy that is storing my boat has been real sick over the past couple of days so I have been avoiding the bio hazard as i already had by near death experience for this year. But i dropped off some food and meds and ran into the garage to take a look at the wire. It appears that the Hot Horn wire comes out of the red plug bundle and then gets split into this mystery wire, with one end to the hot horn and the other grounded. Then the Hot Horn wire continues up and into the block... Sooo I should be able to ignore that mystery wire or remove it completely from the system correct? The correct path for the Hot Horn wire should be from red throttle plug to the place where it enters the block? Correct?

 

[CatTwentyTwo]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

It think you're on the right track. The temperature sensor switch in the block is open under normal conditions and closes and grounds the tan wire when the motor gets too hot. It sounds like that mystery wire is already grounding the tan wire and your horn will always be alarming. I can't imagine why someone would tie that in. If you want to PM me your e-mail I will try and make a copy of the wiring diagram that I have.

 

[mark1961]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

The jump wire goes to ground? Are you sure?.....that just doesnt make sense as the horn would sound constantly with the ign on.

Anyway, im pretty sure that tan wire should go straight back to the overheat horn via the plug, this is according to the wiring diagram in my OEM manual from 1982.

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

So upon inspection last night after i ripped off the 42 layers of electrical tape... the tan wire coming off the red throttle plug was cut and spliced into.... the mystery wire and the factory wire to the over heat sensor. Just a quick snip and complete removal of the mystery wire... added a heat shrink butt connector to patch the factory wiring and WAMMO according to the diagrams I have it as it should look coming from the factory. I hope :redface:

The real question is why this mystery wire was added in the first place. My two ideas was one... the PO was trying to actually use the overheat alarm as a horn or two... the alarm in the throttle control is broke and it was wired this way to sound an external alarm. EZ had an idea that maybe it was wired this way to light a bulb (light bulb) as a visual alarm to the motor overheating.

Gonna try to fire the motor tonight... had a snafu (my 50 cent word for the day) with my outboard gas tank connectors... hope to get the right parts this evening.

Will keep ya updated on the progress.... Throw out ur ideas on why this mystery wire was there in the first place.. and don't go anywhere I'm gonna need to test to make sure the overheat alarm is working... I know this was mentioned earlier and I stated we would cross that bridge when it gets here and well that bridge just may be here. Thanks fellow iboaters!

 

[Piece715]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

The jump wire goes to ground? Are you sure?.....that just doesnt make sense as the horn would sound constantly with the ign on.

Anyway, im pretty sure that tan wire should go straight back to the overheat horn via the plug, this is according to the wiring diagram in my OEM manual from 1982.

I see what ur sayin Mark... but look in this picture... That nut is just connected to a stem coming off the motor... looks like a ground to me... It even has the clamp that holds the bundle of wires together attached to it.... what do you say?!

 

[mark1961]

Re: 1985 E50BELCOB Outboard 50 hp - Unidentified wire and found retaining Trunnion

Yes thats definitely a ground.....as you already pointed out, question is why? Where does the rogue wire go before it reaches that grounding stud? Directly to it via nothing else?

The tan wire has 12v when the ign is on.....the sensor grounds that wire if overheat is detected.....this activates the overheat horn. Have you tested the horn now with that rogue wire out of the system?