I have a 1975 Glastron v-186 with a Johnson 135hp on it. I would like to mount a 9.8 mercury on it as a kicker because of fishing on motor restricted lakes, but I have no room on the transom. I was thinking of making a mount attaching it to the boarding ladder but I don't know if that's advisable. The kicker motor only weighs 75lbs. Any other ideas besides removing the main engine each time?