karncoco
02/09/2009, 08:33 PM
Is it normal for the MP40w to make WUCHING sound on the short pulse mode?
EcoTech Marine
02/10/2009, 09:24 AM
Heh, it's a bit tough of course to express sound in words, but it should make a vrrm vrrm vrrm type of nice as it pulses. If the noise is high pitched and mechanical, it could be a bad bearing in the motor.
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