I run the exact same kicker motor on my 170 for the same reason, free insurance policy just in case. I leave it installed. Check the specs on your bracket, many will be rated up to a certain horsepower or weight. Mine did not have any specs or model numbers (I borrowed it from a sailboat in my yard), so I installed it and SLOWLY put my weight on it (150lbs). If it can handle my weight static, I figure it's good for a 50lb motor getting bounced around a bit. Better to fail in the yard than offshore. I do have a flexible cable locking it to the transom, which is more to prevent theft but would also keep it from going in the drink on the off chance it did come off the bracket.The only issue I have is sitting at anchor, it lists to starboard a bit (perhaps 1" of difference at the transom waterline from one side to the other). I put it on the starboard side to keep all of my rigging in the same place, and also my batteries are on the port side of the console and I thought the weight would balance out better.My two cents, I wouldn't really feel safe installing a motor when I'm offshore and it's really pitching. Safer to leave it installed, as long as your bracket is suitable.