My drive trim pumps are letting the drives creep out of postion when I'm running the boat. I've got a pair of pumps in storage but I'm not sure which they are--trim or K-plane pumps.

What's the difference between the two--if any? I was going to do a quick and dirty swap to see if that solved problem rather than mess with the relief valve at the moment.

I beleieve they are the same except the relief valve setting.

I'm wondering if the genius that reinstalled my hydraoulic lines hooked wrong pumps up to wrong cylinders.

Guess I need to take lines of pumps and see which ones are hooked to which what-chma-callit.