"big fish 2003" wrote in message
...
A friend of mine has a 1990 Mariner 115, and his power trim is not
working, it just makes a clicking sound, could it be bad relays?


Sounds like it could be. I am not familiar with Mariner engines but on my
Yamaha I had 2 relays,one for up and one for down. When I started having
trouble with my up trim I just switched the relays to see if the trouble
followed to the down side and it did. The click seems to indicate that power
is getting to the relay.