1990 180 bowrider. Trim up wont work, but Trailer button does.

[ryan c]

Hi all, new member here. just got the boat about 2 weeks ago. on its maiden voyage, the trim up switch stopped functioning. Trailer button, and trim down work. Took the cover off on the handle and checked connections, all seemed fine and untouched. Checked connections at pump, and all the fuses I could find. everything looked good. Not sure where to start. Im thinking its the switch in the handle itself, since the trailer button works. but not sure if there are relays or anything, and it all looks the same to me. I can do mechanical work, but Im new to I/O boating world. Thanks in advance!

 

[ryan c]

Also, its a quicksilver 88150a7 control unit. are all the quicksilver trim switches interchangeable? seems like it from the manual that came with the boat, but its a little unclear to me.

 

[BillK2632]

It's probably the trim limit switch (round puck on Port side of outdrive). This limits how for the drive will trim up with the trim button - they get old, waters gets in and they fail. Symptom is the trailer button still works. Troubleshooting steps are in this document http://www.boatfix.com/merc/Servmanl/6/6C1R3.PDF look at the Trim Control Out/Up Switch Inoperative (Trailer Switch Operates) section starting on 1C-14.

 

[SeaJay62]

I had that problem and it was a corroded connection in the wiring from the throttle control to the trim pump, about a meter or so from the throttle control end

 

[ryan c]

Phenomenal! Thanks guys!