Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
After trying all sorts of O-ring combinations and still getting leaks, I pulled the spigot out and wrapped the contact area with several layers of teflon tape. I had to experiment with different amounts of tape. That solved the problem for several years. It's started leaking again, so I plan to try the same solution again this year. I don't see why it wouldn't work again, but you know how it goes with boats.
Solomon Smith TANGO 89/WK/TR/#5942 Petoskey, Michigan
Before doing anything, pull the entire pump out. Take it apart (8 screws on the base) and locate the large black rubber cup on the pump piston. Get some silicone plumbers grease and coat the cup with a layer of the grease. The grease is food safe so it won’t hurt you or make water bad. Spread open the lip of the piston cup, I found that my pumps’ cups had taken a set from being unused for many years before I bought the boat - much like an old water pump impeller. Apply a light coat within the white plastic pump housing also. Reassemble the pump and give it try. Doing this immediately fixed the problem for me and made the pump work like new.
And for what it’s worth, I had to also do this with a brand new MK4 flipper pump from CD. Wouldn’t pump water right out of the box.
I think my boat had some knockoff flipper pumps before I pulled them out and threw them away. They didn't have a name printed on them anywhere. The base dimensions were smaller than the Whale pumps.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.