[j1reid]

My variable trim seems to be seized up. How is this fixed?

 

[Ernest T]

My variable trim seems to be seized up. How is this fixed?

You may have rusty/corroded cables especially if you have had the ski in salt water and haven't done a lube in a while. Here is a link that shows how to do the lube, but you will probably need a service manual to do it yourself.