I had to replace an old livewell/aerator pump in the boat. I chose to replace the old Rule pump with a Johnson pump that has a removable cartridge, which makes for easier replacement if ever needed again. I will be using 3m 5200 adhesive/sealant..... but not quite sure if I need to also apply a bead on the inside of the transom when installing? Any other "tips" before I install the pump that I should be aware of? This is my first time replacing a pump, so dang sure want to make sure it is done correctly since it is below the waterline! Thanks