Is there an easy way of changing the plastic water pump tube coming through the transom assembly inside the boat or do you have to pull the outdrive off. It is a 1987 454 mag with a 1987 alpha one outdrive. I have attached a pic to show the plastic tube I am wanting to change. Mine is no longer round and hose is blowing off This is not my pic, mine would not upload. Got this one off the web but it is the white plastic tube in the picture held in with the plate and two bolts