Oildyne Trim Pump on the Fritz!


This past weekend I had something happen with my trim pump. Maybe you can help me find what has gone wrong?

While underway and up to speed, I noticed the up trim wasn't responding. I slowed, and found it to work at slow speed or in neutral. Taking a closer look, I found the pump was working for trailering and for down, but not up trim - it was just clicking. Later on in the day, I found that the trim wasn't responding in either direction, and the trailer button didn't even work anymore - just clicking all around.

The oil reservoir is filled OK, and I assume the fuses are OK since I am getting those clicks, etc. Trim systems are strange to me, coming from sailboats with manual trim o/b motors, and I wonder what it could be. I don't see an obstruction on the outdrive... I think that air in the system would tend to squeal in the cylinders... Any ideas? Maybe water in there? Perhaps a grounding problem?

Much appreciated,
Michael Ruth



Sounds like the motor part of the trim pump assembly is bad. Take the unit to an electric motor repair shop or automotive starter repair shop. They can rebuild it with brushes, etc. It probably is just "tired".




Please submit whatever questions you have to IHRTechTalk@yahoo.com.  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Mark C.


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