Omc Sterndrive Tilt Problem

[gooders]

gOT A 1989 omc cobra fitted. Got a problem with the outdrive. When I operate the switch on my throttle lever, nothing happens. Cannot hear hydraulic motor turning, no click no nothing. Think its electrical. The boat has been laid up for a while, starts great but no movement on the outdrive.Guys, please can you give me some ideas, I am not that well up on electrics so simple instructions would be great.

 

[Don S]

Re: Omc Sterndrive Tilt Problem

Do you have the relay control box mounted on the trim pump, or the 2seperate relays that control the trim, on the engine?

 

[gooders]

Re: Omc Sterndrive Tilt Problem

From what I can see by looking under the transom I think there is a box on the side of the pump. I will undo the screws and take the pump off to have a good look, cant do that till tomorrow. Any help is greatly appreciated, as I say not an expert with electrics so very simple instructions is what I need am afraid. Thanks

 

[Don S]

Re: Omc Sterndrive Tilt Problem

You don't need to take anything apart, just look at it.
Here is the test procedures if you have the relay control box.

http://i123.photobucket.com/albums/o291/DonSind/SXTrim.png

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Thanks Don. I think my neighbour is an electrician so I am going to ask him to help me out. Think you are right that it is electrical, will try and sort it tommorow. Thanks

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Hi Don, just had a quick look at the wires coming from the throttle lever, I can see there is lots of white powdery substances all over the spade connectors were the wires meet. Do you think this would stop the supply getting to and from the switch.

 

[Don S]

Re: Omc Sterndrive Tilt Problem

It's called corrosion, why don't you clean things up and see if it works,

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Thanks Don. Thought it would be a problem, but was not sure whther that would be enough to stop the current getting to the switch.

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Thanks Don. Checked the relay out this morning after cleaning the wires. Seems that is the problem as no voltage were there should be.

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Hi Don, just sitting here trying to source a new relay block. Just wanted to know for sure what you think about this. Is there anyway of by passing the relay block from the battery, or running a positive lead to one of the relay terminals to see if tilt operates when switch turned. If so what terminal would be best to use./ I have your diagram for refernce thanks. I may have to source one from the states, not sure yet but just wanted to be doubly sure that it was the relay before I start the hunt for a new one in earnest.( no doubt you are right with your prognosis, please dont be offended for doubting you)..
Thanks

 

[Don S]

Re: Omc Sterndrive Tilt Problem

To test the motor, disconnect wires C and G from the relay block. Put one wire to + and one to - terminals on the battery. Motor should run, reverse the wires to go the opposite direction.
Volvo used that same relay from 94 to 96 or 97 for the SX drives. So that may make it easier to find.

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Great, will try that. thanks.

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Just tried what you said, works a treat so definitely the relay.Thanks for your help.

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Hello again. I took the relay over to my electrician friend and we have carefully managed to remove the cover. Everything looks fine inside, nothing obvious. Going to connect it all back up again in daylight to see what is happening. The question is this, if the relay appears to be working then I suspect it may be a problem with the wiring from the toggle up down switch, on the throttle lever mounting plate there are three screws on the outer and on the inside of the throttle housing there appears to be two screws. If I remove the outer screws will the unit come away without moving parts popping out? From your previous posts I know there is no lever voltage from the terminals when I trim up and down, am I wasting my time with the relay or could it be the throttle wires?

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Don, I apologise. Have been letting my pocket rule my head. Have taken plunge and ordered new relay block. Cost $300, should be here next week. Will let you know how it goes.Thanks again.:redface:

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Hello guys need your help badly. Posted this problem a while ago. Advised may have been faulty relay on tilt motor. Boat is 1989 OMC . I received the relay today and fitted it. Still no movement on the sterndrive. Having spoken with Don and carried out the checks he advised me to do, this is the situation.
The motor on tilt unit is fine, fed direct supply from battery with good result no problem there.
Carried out voltage checks with new relay as instructed by Don. There is definitely power getting to the relay, however when I operate the up/down on the throttle.Nothing. The voltage checks indicate a problem as there appears to be no voltage when there should be.on the output terminals of the relay.. I am now suspecting the wiring at the switch, however I am totally unsure of how to access the wires in the throttle assembly. The outer casing has three screws, the inner has two and there appears to be a bolt head in the inner centre of the throttle itself.I have noted that the battery gauge does move very slightly when I operate the up and down . I need to know what to expect if I start dismantling the throttle assembly as I do not want springs etc flying everywhere. Also are there any limit switches that I should be aware of.\Thanks

 

[boatguya1]

Re: Omc Sterndrive Tilt Problem

Not looking at a diagram now but there should be 3 small wires going from the trim pum assy to the handle. It will either be white/green,white/red,white/blue or solid green, solid red, solid blue. Follow them towards the front of the boat. You will probably run into a rubber plug in connector. Make sure the connectors are clean and it is plugged together well. Does it work now? The red should have 12v batt positive. Jump the green to the red and the drive should go down. Jump the blue to the red and the drive should go up. If it moves when you jump these wires then the problem is somewhere between there and the switch on the handle including poss the switch.

James

 

[boatguya1]

Re: Omc Sterndrive Tilt Problem

There is a 93 omc with a small block ford 5.8 in one of my work bays now. Just looked and the plug in connection I'm talking about is mounted on the starboard (right facing front) side exhaust riser by the two red circuit breaker buttons.

There is also a breaker reset button on the relay assembly push it in if you have not already.

James

 

[gooders]

Re: Omc Sterndrive Tilt Problem

Thanks for the advice , going dark over here now iso will look at it over weekend. As you rightly say the wires are multi coloured. I looked at the plug connector near to the engine but never took it apart as it looked \ok. The story is that I have had her laid up for the winter just periodically starting the engine to keep her ticking over. Never thought of operating the tilt as thought it was ok. Obviously each time I started her up I throttled her up and down just to get the oil moving and give the battery a boost. So I cant really see why the connector would fail now? Will try what you said and see what happens, I have noticed that the predominantly blue wire with the white stripe looks a bit worn. I also saw the rubber plug were ther three wires disappear inside the throttle housing. If I have to get inside there any advice how I go about it as it looks very fiddly.

 

[boatguya1]

Re: Omc Sterndrive Tilt Problem

I would check the plug at the engine. If still not working unplug it and see if there is 12v+ on the side that goes to the trim pump red wire. Then try to jumper one of the other wires to it to see if it moves. This will let you know if the problem is towards the handle or towards the pump.

James