Service kit for the Whale Gusher 10 Bilge Pumps. This particular service kit includes two different sets of valves so that either of two different generations of pumps can be rebuilt. The partiality rounded valves are for the earlier Mark II Gusher 10 Pump (built until 1983). The square valves are for the later Mark III Gusher 10 Pump (built from 1984 to present).
This is the original equipment pump used on the newer boats including the Catalina 310, Catalina 350, Catalina 375, Catalina 380, Catalina 387, Catalina 400, and Catalina 440. The early Catalina 34, Catalina 36 and Catalina 42, used a smaller pump, our #Z2745. Later, Catalina Yachts upgraded the bilge pump in the Catalina 42 to the Gusher 10.
The yellow pump with the cast aluminum body pictured below under "More images" uses this kit.
Important safety information: From Whale's maintenance instructions: "Regular inspection of the pump is recommended. Rubber components should be replaced if worn or every three years regardless of condition".