Power trim Problem

[Edmund Arthur Dickenson]

I have a Mercruiser 1979 140 HP, the unit has 2 trim solenoids, one of the solenoids has been replaced and there is a wiring problem I believe. The trim down function sometimes just clicks , and or operates very slowly to lower the outdrive. The up function works fine. I have a haynes manual , although the wiring diagram is very unclear/ small and hard to see which wires go where, also the down solenoid switch in the operating handle gets hot also when holding in the down trim, Art

 

[Spidybot]

Re: Power trim Problem

Had a similar problem and ended up with a trim motor rebuild. Quite surprising, as I thought the motor was all OK as it ran fine one way.<br /><br />A replacement motor was WAY too expensive and the old one was renovated by a skilled auto-electric workshop for a fraction of the cost.<br /><br />BTW the reason for it all was, that the rubber grommet in the housing leaked and (a little) water made it's way into the trim motor.

 

[karayj]

Re: Power trim Problem

Im having the same thing i have to use a screw driver to by pass my switch in my throttle handle so i shold buy a new pum instead of a relay ????????

 

[Spidybot]

Re: Power trim Problem

If your electrics work - just not when the relay/solenoid is engaged by the switch - your setup is working fine except for the switch and/or the relay for that direction.<br /><br />So that sound's pretty much like not a new motor.

 

[karayj]

Re: Power trim Problem

true thats what i thought im going to buy a relay for 18.00 rather then a pump from ebay for 80.00 also it worked fine last week thanks!!!

 

[Edmund Arthur Dickenson]

Re: Power trim Problem

Is there some way I can get a wiring diagram to check it out, or a test procedure for the pump

 

[karayj]

Re: Power trim Problem

i can look at mine and give you the colors and where the go i that helps you what relay do you need info on top or bottom

 

[Edmund Arthur Dickenson]

Re: Power trim Problem

Karayj, that may help me although my boat is a 79,the down trim solenoid is the one I have the problem with, also how many connection points are there on yours, mine has 2 large ones and 2 small ones, Art

 

[Walter]

Re: Power trim Problem

Which of the two solenoids (up or down) was replaced? The "down" solenoid should have black wire leading to one of the small terminals (ground) and a green wire leading to the other small terminal (trigger). The "up" solenoid should also have a black wire connected to one of the small terminals (ground) and a blue wire connected to the other small terminal (trigger). <br /><br />Resistance causes heat...so I suspect there is a poor connection at the "down" switch at the shift selector/throttle control handle...or the switch itself is bad.<br /><br />Keep in mind the outdrive travels slower going down than it will going up. This is normal.<br /><br />Hope this helps get you started troubleshooting the problem.<br /><br />Walt

 

[Trent]

Re: Power trim Problem

Swap the solinoids and see if the problem changes. Dirty contacts inside the solinoids can cause problems.

 

[karayj]

Re: Power trim Problem

I have the same set up 2 large 2 small with the same problem i am getting a relay today i will tell you the color wires and where they go wednesday they way well do it is i well map it as if its still on the unit for example small furthest small closet to you lower large uper large ect ect...if you want you can email me and i will give you my 800 number at work and talk you through it jayvette75@yahoo.com

 

[karayj]

Re: Power trim Problem

ok here is your info :relays attached to the bracket which is attached to the pump .....<br />on the lower relay the smaller screws black wire goes on the small screw closest to you the green blue white strip wire goes on the small screw furthest from you the red large power wire goes on the top large screw along with the bracket that connects to the other relay and on the other large screw the bottom one its the green with white strip wire / the upper relay is as follows :<br />on the smaller screws the black wire goes on the one closest to you the green with white strip goes on the smaller screw furthest from you on the larger scres its a small red power wire thats gets put above the bracket that connects both relays and on the lower large screw its a black with white strip i hope this helps dont forget a bracket connects the large red and small red wires toghetheras a bridge to both relays remember these direction are as if everything is attached to the pump ......

 

[karayj]

Re: Power trim Problem

i changed my relay the lower one the tilt works great thank god i did not buy a trim pump !!!!