got a project boat, and it has the 4.3 merc. its a 1995 195 signature open bow, do you just drain the oil into the boat and let it drain out the back, drain plug of the boat? i only ask because it looks as if it has been done before/ black oil stain were bilge pump is. not much space there. I could use these airforce absorbant rags. and dribble some oil out/ close it... change pad/ repeat. or do they sell a drain hose that hooks to plug area/ then out the back of the hole of the boat?