Have a 2003 Skeeter ZX250 w/ 12" Detweiler jack plate. The motor/pump makes a noise but it isn't wanting to move up and down. At first, it jerked a few slots up and down, now it is low position and will not move back up. The pump/motor just makes the noise but no movement. What could be the problem? Any help is appreciated. I am using the boat again this weekend but can't if this doesn't get resolved.