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Trim Sender Wires

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wblazer

Regular Contributor
Well my problem with the stripped brass shift cable is solved moving on with this project. The last owner was not using the trim sending units on my Alpha One MR Drive. He cut the wires and was trimming without using them. I want to install new units and to the point of trying to remove the two 7/16 hex heads that trap the wire he cut off. Can someone please tell me the best way to remove these screws they are really blocked and in a bad spot to get a wrench or socket. Thanks for any help.
 
Bt Doctur said:
remove the gimbal housing and the main bellows, then some Snap-On 1/4 inch drive swivel sockets
Click to expand...
Yep. My trim sender is shot causing my trim guage to peg at full up. I'm going to have to install new trim and tilt limit senders and the only way to pull those cables through is to remove the outdrive and gimbal housing. A pretty rotten design if you ask me, but that's how Mercury did it.
 
where the design went bad was allowing 12v to constantly be applied to the sender.Correded/ broken insulation only adds electrolsys to the transom area.
A better system is to remove the power wire from the gauge and only apply 12v when the trim button is pressed. You do this by using (2) 1N34 diodes.
go to the wires coming from the trim at the control box. wire one diode to the blue and one diode to the green, connect the ends together and run a wire from them to the power side of the gauge.
This way 12v is only used when pressing the button to activate the trim gauge
 
Have been working on getting the top bolt out for a good while off and on. Heated and bent 7/16 box wrench many times with no sucesss removing the bolt. The head is rounded and I really can't get the wrench in the proper position to turn it. I have tried swivel socket and ground down sockets and wobble extentions with no luck. Can I remove the gimbel clamp bolts to give me another angle of attack. Or am I asking for trouble removing these bolts and nuts. Thanks for any help given.
 
you can remove the 2 bolts for a slightly better access . you do have to bend it a certain way using a 12 point wrench.
needs like a 3/4 offset
 
Thanks BT Doctur I will remove the 2 bolts and bend the wrench to a 3/4 offset. It seems odd that there is not a wrench sold for this project.
 
The wonders of having a hot torch and a bit of knowledge to make things easier
Use a 12 point cause there isnt much room.
reinstalling it use long needle nose to start it
 
Bt Doctur, I have a tourch set up bent the wrench 3/4 offset. Is it possible for you to post a pic of the wrench that you use. I am not sure if I am bending the wrench at the proper location. Still having problem getting to the bolt.
 
DSCN3761_zpsver5yeoc.jpg

You can see the left side has a little sweep to it. That wrench is a HEYCO "555" made in germany
the offset is 3/4
 
Wow, I feel your pain on this one. Something that appears so simple, becoming such a major project. My Alpha 1 trim sender just failed this past weekend and I found it was a corroded and broke wire to the sending unit. Rather than go full out replacement, I simply cut the other wire and removed the sender. I took it apart and once I seen how the wires are embedded in the device I simply replaced them with new wires. I then spliced them back into the boat wiring with heat shrink and butt connectors. Back in Business :)
 
For additional info on the two bolt compression clamp that gives everyone so much pain....
I believe if you order a replacement for a gen II it only uses the lower bolt. It is thicker then gen I and it has a slot to allow wires to slide thru for easy removal and install.
 
Well tried bending wrenches in all different directions. The bolt head was too rounded off to get good contact with the wrenches. What I did to remove it was grind a 6 point 7/16'' socket to a width of 11/16 and also ground a wobble 6''- 1/4 '' extentions body to 11/64''. Then at the top of the ring I was able to remove the top hex screw. Hope this info helps if you have the same rounded hex issue as I had. Thanks for all help given this forum is a great place to share information.
 
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