power trim problem


Old 09-30-05, 08:56 AM
Visiting Guest
Posts: n/a
power trim problem

I have a 18' Sea Ray with Mercury 3.0 and Mercruiser Alpha 1 stern drive. My problem is that the drive unit trims/tilts down with no problem, but won't trim up.
It will trim up with the trailer button, but not the up/down toggle switch. Could this be just a switch problem? I think that there is a limit sensor on it, could this be the problem? Any advice is appreciated
Sponsored Links
Old 10-07-05, 12:17 PM
Join Date: Oct 2005
Location: Savannah, Ga.
Posts: 38
Everybody has this problem with their Mercruiser eventually. There is a trim limit switch in the outdrive that is there to keep you from trimming the engine up too much when you are under way. This helps prolong the life of the u-joints in the outdrive. The insulation on the wires where they pass through the bell housing wears off and the trim limit switch quits working. It is an expensive switch, and the outdrive and bell housing have to come off to replace it. Most people just let it go. If you do, use your trim indicator to make sure you don't raise the motor too high with he trailer switch while the motor is running.

If you are real lucky, your trim switch up front is bad, but we never get that lucky with a boat, do we?

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes