Jabsco 50840 Series Marine High Flow, Low Pressure Cyclone Centrifugal Pump, 29.7 GPM

Our university research team used this pump for 30 straight 8 hour days to transfer water from a high-speed boat transom pickup to a large fish holding tank on deck. It performed flawlessly moving enough water to keep our 1000 L tank with fish fresh and healthy during transport, and it shows no signs of slowing down.

Replaced its former peer. Great pump, seamless swap- does its job.

Ran solid on my ctsv for 3 years until it was blasted by a man hole cover. Which split the part in 2 at 5 mph. I upgraded to the c6 zr1 pump and noticed the increase in temperature drop after spirited driving and general about 5°F lower average iat2s. However for the money the Jabsco is hard to beat especially given the all metal external and internal structure.

Installed it in my boat to run the live wells. Used the same inlet as the previous unit. It kind of ran for a short time, 30 minutes, then wouldn’t pull water anymore. It is supposed to be able to prime up to 6.5’ so I placed it on a bucket full of water, wet the pump and it wouldn’t pull anything. I wanted too long to install it and now I can’t return it. Don’t make my mistake, just don’t buy it. Oh, there is a 3 year warranty that they don’t seem to want to honor through the manufacturer. It was quiet though, because it didn’t do anything.

Really a pretty good pump. No rust, high flow, quiet motor operation, smooth significant flow, low drain on the 12 volts batteries I use. The only problem I had is that this pump won't self prime. I had to go to Harbor Freight to buy another pump to put in series with this pump to get it started flowing each time I use the Jabsco pump. Once the water is flowing, the Jabsco pump works just fine and I turn off the primer pump. Priming the Jabsco takes some finesse. I use this pump to pump water and methanol out of 55 gallon drums. I use a hose with a gasoline type hand held valve to fill the other containers. This works great, with the exception of priming, or getting the water flowing initially. Once the flow starts, I can empty an entire 55 gallon drum in short order with very little battery drain. Real good product overall. Cheers