Outside lower unit will not go up

[Chasrein01]

Having wiring issues on a 1979 MelHart with the 140 inboard. Outside lower unit will cycle down but not up. I found 2 wires dangling by the unit. The wire are totally frie and I followed them into the main harness. They are spliced into 2 different shades of blue wires. Where do they connect after I install new wires? Are they the up trim solenoid / motor? If so, how do I connect them to the lower unit?

 

[alldodge]

Welcome
What motor Merc, VP other?

 

[Chasrein01]

It's a Mercruiser 140.

 

[alldodge]

Most likely the trim limit switch is the issue. Can you get drive to come up using the trailer buttons?

 

[Chasrein01]

The only button that works is the nown.

 

[Scott06]

The only button that works is the nown.View attachment 401985View attachment 401986

First pic is the trim limit switch so definitely the trailer button will only make it go up - do you have a manual with wiring diagram looks like you have some wiring stuff to work through

 

[Chasrein01]

No I don't. Purchased the boat used.

 

[Chasrein01]

No I don't. Purchased the boat used.

I also traced those wires through the hull to the inside wires. Just past the blue wires the wires are as bad as the outside ones..

 

[alldodge]

Being a 1979 do you have the 3 button up/down/trailer?

 

[Scott06]

No I don't. Purchased the boat used.

Not owners manual get the mercruiser shop manuals for your engine and drive serial numbers. If you post the serial numbers people here can confirm which manuals to get. I got mine used off ebay invaluable if you plan to work on your boat

 

[Chasrein01]

Not owners manual get the mercruiser shop manuals for your engine and drive serial numbers. If you post the serial numbers people here can confirm which manuals to get. I got mine used off ebay invaluable if you plan to work on your boat

It's dark now. I'll post them in the morning.

 

[Chasrein01]

Being a 1979 do you have the 3 button up/down/trailer?

There are 3 buttons. Up/ ? /down. Word is worn off middle button.

 

[Chasrein01]

It's dark now. I'll post them in the morning.

5450073. 1.98R. Those are the numbers on the lower unit.

 

[alldodge]

Good then you should have 2 relays and your wiring should be as in pic

 

[Chasrein01]

Thank you. Also where do I connect the outside wires? Do I have to remove or drop the outer unit?

 

[Bondo]

Thank you. Also where do I connect the outside wires? Do I have to remove or drop the outer unit?

Ayuh,..... jumper 'em,...... right back to the up solenoid if necessary,....

 

[kenny nunez]

Those outside wires pass through the upper part of the gimbal housing. They are held in place with two 1/4” 20 bolts that are going to break off.
If you do not have a trim gauge just cut those wires off. You should be used to how your boat feels when trimming it in or out.
Do like Bondo suggested and save yourself a lot of greif.