[Fr. Frank]

Remember the trim pump is just that, a pump. It only sucks soil from the reservoir, If your motor is turning, but the pump isn't pumping, check the fitting that goes between the motor and the pump. The motor shaft is designed to fit into a small adapter that in turn rotates the pump shaft. Make sure that the motor is actually turning the pump while it's spinning. Often, when the motor is mated back to the pump after replacement or repair, the small part that actually connects the two gets lost, ans it has a tendency to stick to the shaft of the motor as it is removed, but just long enough to then fall off on the bench somewhere, or into the bilge if you remove the motor while the pump assembly is still in the boat.
After that, disassemble and check the pump. If the pump was failing, that could have been the catalyst for the failure of the motor in the first place.
The four-hose pump is the same pump as the nearly identical-looking two-hose pump, only the manifold on the pump base is different. If necessary, you can pick up a two-hose pump and just put the manifold off the bottom of your pump onto your "new" one.

Oh yeah, you can get the motor down by opening the relief valve on the pump, and then standing on the lower unit to apply pressure. Don't bounce on it with your weight! I was told that bouncing on the lower can briefly quadruple the amount of force applied to the hydraulics, and may damage one of the old seals on the trim/tilt cylinders.

If that doesn't work, remove the hoses from the pump and put the ends in a small container of oil, and then stand on the lower unit. (The small container of oil minimizes the amount of air to bleed from the lines later)