So many different opinions
Hi Fly,
I've asked the same question. According to the Yamaha manual. It suggest towing with the motor in the down position as long as the skeg will not bottom out. I would guess that the skeg would have to be the same height as the last cross member of the trailer. The reasoning, as I understand it, is to keep the weight of the motor off the tilt mechanism so if the seals failed, the engine would not fall down (think of skeg cutting a new line in the roadway).
Triumph recommends a transom saver. This device attaches to the crossmember of the trailer and holds up the lower unit of the motor. It takes the pressure of engine weight off the transom and the tilt mechanism.
The My Wedge product only takes the pressure off the tilt mechanism. From what I've seen at the web site, it looks like a hollow tube with a rubber insert on one end. The tube fits over one piston of the tilt system, you lower the engine until My Wedge takes the weight and off you go.
For now, I remove the tilt pin, tilt up the motor, replace the tilt pin in the highest hole and let the motor tilt back down until it contacts the pin. The motor skeg is nine inches above the ground and the trailer cross member is also 9 inches above the ground.
I gone over some major bumps or dips in the road and so far, no damage to the skeg. However, using this method does not remove the weight off the transom.
Eventually, I may go to the transom saver. At west marine, there are several that run between $35 and $65.