SeaStar - Older Style Helm Seal Kit - HS5151. Features:. SeaStar HS5151 Seal Kit Fits 1984 - 1990, Helms. SeaStar 1.7 and 2.4 Helm Pumps were Manufactured From 1984 through 1989. Fits: HH5271, HH5279, HH5280. Units prior to 1984, there is no seal kit.