Air Conditioner Water Pump Surge

northshore

Well-Known Member
Jan 17, 2011
2,096
Cleveland, OH
Boat Info
1989 340 Sundancer
Raymarine E90W Radar/Chartplotter
Engines
Twin 454 Mercruiser 340's
Splashed last weekend and all went well but...

Turned on the AC and once the pump finally primed (a minute or so) we got water flow out of system.

Problem is the water pump flow surges. This is anywhere from normal flow to just a trickle and it is incredibly regular (about 10 second cycles) so I really don't think (although I cant be certain) it is air in the system. Sea cock is wide open and the strainer was pretty clean.

The original AIRRRRR (now Dometic I believe) is still installed.
 

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