time to replace power trim relays on merc 90hp 2001 again?

wn6ngp

Petty Officer 1st Class
Joined
Aug 12, 2012
Messages
217
I went out boat riding Friday and when I first started to launch there was no up trim only down trim. After some vibration that relay started working so I went out and no more problems. This kind of thing happened about 7 yrs ago where it was intermittent and then stuck wouldn't go up. I replaced both relays back then and it solved the problem. I see lots of U tubes about how to replace them. Its a simple thing. However, it makes me wonder why these relays must fail often. Maybe they can't handle the vibration the way they are attached to the frame. Have others experienced similar failure rates? I'm going to buy some replacements and make sure I have the tools on the boat so I can replace them on the water. I don't think that there is a problem with the cabling and connectors.
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
43,594
First time it "might" be the relay. Having it happen twice it's most likely not the relay, might be the switch or the wire connections
 

Mc Tool

Ensign
Joined
Aug 7, 2024
Messages
916
7 years ago ? Do you use the trim a lot ? ....I do .
Also it wouldnt hurt to make sure the trim motor is within spec.🙂.
 
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