With a 1800 road mile summer coming up I too was wanting a better way to carry our motor. With the Garlock adjustable mount the leverage the motor could create against the stern was just too much with the rough roads so leaving it on the mount was not an option. We usually carried it in the tow vehicle loosing cargo room. A tongue mount of some sort was want I wanted.
Well since we our launch got delayed a week thanks to storms I had some time to work on this. I scrounged around the shop and found some square tubing the same size as the trailer tongue. After a quick stop by the metal shop for a piece of 1/4" plate to use as the motor mount base it was time to start making some sparks.
I welded the 1/4" plate to a 2x2x1/8" vertical riser that I then welded to the front of the trailer as far forward as could so the winch handle would clear yet still leave room for the motor between the tow vehicle. I added a brace from the winch stand to keep it vertical. I added a pressure treated piece of 2x8 cut to size and it was ready to try out.
Cindy was concerned about it being strong enough. Well the plate I bought turned out being a little warped from the shear. After I got it all welded together I could see the right side was bent back a bit. I got out my 24 oz ball been hammer and tried to straighten it. Ever try to straighten 1/4" plate? It took more than a ball peen hammer. After a few "taps" with a 4 lb sledge hammer it was back in line and the mount never moved. The boat trailer slid on the wood block it is resting on but the mount held tight.
It went much smoother than I had expected it to and I was done in 45 minutes. I did not think I would have time to get it painted so I did not pick up paint on the way home. I will have to do that today. But the motor fit nicely and there is still room for my hand on the winch. I added a welded loop to attach a safety chain/padlock to securing the motor to the trailer.
I plan on running a 1/4" wide metal tabbed zip tie through the mount clamp handles that will keep them from backing off. I actually run .040 safety wire through them when we are the lake to secure them and to make it a bit harder for someone to steal our motor. Between the wire and the padlocked steel cable ran through the motor and the mount bracket I feel like our chances of loosing the motor off the back are pretty thin and if someone really wants to steal it they are going to need several tools and few minutes to get it off.
Sam