I have a 225 hp mercury on a Champion 201 dcr. While out last night I looked back and the hydraulic jack plate was up at its highest setting without me hitting the switch to raise it. I lowered the jack plate and that worked fine, but it would/will not raise the motor any more. When I push the button to raise it, no noise can be heard, but when trying to lower it, even though it is all the way down, it makes a noise like it is trying to lower it. Any ideas on things to check?