There is a tube that runs down to the lower unit which i am assuming is a vacuum or pickup for the speedometer. It was attached to a plastic nipple with a wire tie. The nipple cracked off. Is this screwed in or just a plug in and how do I replace it. Half of the nipple is still in the hole and I don't want to push it in if it will cause a clog or other problem.<br />Thanks in advance for any assistance.<br />Mike
