[Destroyer]

OK. From the start I'll offer that I do not know what the problem is. However I can make a few deductions and comments.

1) You say you can hear the motor trying to work, so from that we can deduce certain things. We know (suspect) that both of your solonoids are good and are working. And we can suspect that either your motor is shorted or something is mechanically preventing it from working. That prevention could be either inside your motor or outside. (Loose/cracked magnet, part of same, rust, corrosion, bad brushes, etc) The first thing you need to do is determine if indeed the motor is working. Go here for a proceedure to test if the motor is ok electrically. http://gracomfg.blogspot.com/2013/01...motor-for.html

2) Have you checked your system for the proper amount of hydraulic fluid? Since you didn't tell us what kind of an engine you have or the year I can't give you specific advice. Different systems have different ways of doing this so I cannot help you other than to tell you to check. Low or no fluid will result in the engine not moving.

3) As an aside. You said that you and your friend manually lifted the engine to get the boat home. Why? Lifting the engine places increased torsional stress on the transom since you are changing the engines center of mass. The further out from the stern, the more torque you apply at the point where the engine attaches to the boat. If you are using a "transom saver" type of device to support the engine to the trailer it's true that will somewhat lessen the problem, but it will increase the stress placed on the transom and the engine with every bump you hit. Your trailer should be high enough that your engine can safely be lowered to an upright position for trailering. If it is not than something is wrong. If your engine's skeg or prop is hitting the ground or is very close to it than a) you have the wrong size engine [I.E. a 25" shaft on a 20" transom] or b) your trailer, where it connects to your tow vehicle, is set to the wrong height. (Your trailer tongue should be level when it's attached to your tow vehicle). You can adjust this by either getting a trailer hitch with the proper amount of height (or drop) or getting an adjustable hitch that does the same thing. The only time I lift my engine is when I'm launching or retrieving my boat or when it's in a slip for an extended period of time. (like overnight or longer). Once I have my boat on it's trailer I lower the engine back down. I've never once broken a skeg or nicked a prop while trailering my boat.