I have a 5kw water cooled 48V motor with a VEC300 controller, connected to a 14 cell LFP battery, powering a converted 9.9 Evinrude outboard.
It works fine but it is really noisy.
3-4 feet away, under no load, with the engine cover off, I measure up to 90 dB.
This is with the motor disconnected from the outboard motor gearbox.
Is this noise level unusual?
Is it possible for a mistake in the wiring to cause excessive motor noise?
IThe noise drops about 10dB when I put on the heavily insulated engine cover, but even 80 dB is much noisier than I would expect.
Any thoughts or suggestions will be appreciated.
