I'm winterizing the boat myself (as opposed to having it done at the dealer)for the first time this year. My plan was to put the 5 gallons of antifreeze in a five gallon bucket next to the sterndrive on the ground & let the engine suck it out. I have seen / read where others set the bucket on the swim platform. Will either way work or does setting it on the swim platform allow for some type of siphoning effect?