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.

Includes:
• Primary diaphragm
• Replacement flapper valves for both the mark 2 & 3 gusher 10 pumps
• Cylindrical rubber buffer prevents the mechanism from striking the inside of the housing
• Critical internal fasteners

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".

See "28 GPM Pump Installation and Maintenance" below under "Technical Support"