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Old Oct 18, 2013, 08:45 PM
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Joined Sep 2013
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Newbie. Do water cooled motors act as a pump?

Do water cooled electric motors act as a pump to move water through them or is the water forced through the tubes by the boats movement?

We just got an aquacraft Revolt 30 and it seems it is not moving water through the motor. We are not sure whether we had a clog or the motor is not pumping the water properly. It over heated within the first two minutes of running.
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Old Oct 19, 2013, 01:36 AM
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cyberhoops's Avatar
Seattle
Joined Feb 2006
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No pumping... just water pressure from the pickup tube.
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Old Oct 19, 2013, 02:53 AM
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Australia, VIC, Blackburn North
Joined Feb 2011
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Easiest way to check water flow is by pushing water through the system by either a syringe or a mouthful and blow it through or just blow through the outlet. It should be pretty easy to blow through.

Check all the lines to ensure they aren't creased, if no creases, there may be some debris caught in the system somewhere.
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Old Oct 19, 2013, 09:08 PM
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Joined Jan 2010
216 Posts
What do you mean by "overheated"? Did you measure the temperature of the motor or ESC? What prop were you using? Exactly what packs? Mostly full throttle or mostly part throttle?

It is pretty easy for water in the lines to drain out when the boat is lifted from the water. A rudder pickup will drain almost all the water if the bow is held up for a few seconds. If you can blow through the lines, there is probably plenty of water moving through them when the boat is moving.



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Old Oct 20, 2013, 04:28 PM
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Joined Sep 2013
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thank you all for your help. We blew out the lines. They had been blocked by moss and the engine went into limp mode. All is well now.
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