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Old 01-16-2015, 12:46 AM   #21
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I have an electric bow thruster and a hydraulic stern thruster. The electric is louder and has less thrust. But the hydraulic motor is submerged, while the electric motor is underneath a bunk forward.
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Old 01-16-2015, 12:59 AM   #22
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I have an electric bow thruster and a hydraulic stern thruster. The electric is louder and has less thrust. But the hydraulic motor is submerged, while the electric motor is underneath a bunk forward.
We have electric bow & stern thrusters, identical 13 HP Wesmars. The stern thruster is far quieter than the bow, which would suggest the racket is generated at the props not at the motor, since the stern props are outside the hull.
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Old 01-16-2015, 01:35 AM   #23
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My 24-volt thruster is very noisy, but I can live with that.


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Old 01-16-2015, 06:40 AM   #24
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I had a Vetus installed by Florida Bow Thrusters on the previous boat and it had the 5 blade prop. When out of the water if you hit it, it just made a whine noise. In water you could here it but it did not make near as much noise as many others that I have heard. It had a lot of thrust.
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Old 01-16-2015, 08:57 AM   #25
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I just looked at some photos of the thruster install. I was wrong, it was not 5 blade it was 6 blade. I have no idea if that caused it to be more subdued than others. But it was.
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Old 01-16-2015, 09:07 PM   #26
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I just switched my Vetus from the original 3 blade to the new 6 blade. No cavitation noise at all and just a whine. To the OP, how far below the actual surface of the water is the top of the tunnel and is that within spec of the installation guide?
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Old 01-17-2015, 04:47 PM   #27
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I was just reading the Rolls Royce has invented a permanent magnet thruster with no shaft or motor, the prop blades and the case are the motor. Lower maintenance (fix it under water) and more thrust, way quieter. Good idea. No gear train to made all the noise and need maintenance.
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Old 01-17-2015, 05:02 PM   #28
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I just switched my Vetus from the original 3 blade to the new 6 blade. No cavitation noise at all and just a whine. To the OP, how far below the actual surface of the water is the top of the tunnel and is that within spec of the installation guide?
Have you noticed any difference in performance? We have an older Vetus that is undersized and any increase in the thrust would be a help.
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Old 01-17-2015, 07:03 PM   #29
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Have you noticed any difference in performance? We have an older Vetus that is undersized and any increase in the thrust would be a help.
Yes there is an improvement, but I can't really say how much because there was 6 months on the hard between old and new. I have the VETUS BSCHR12A thruster. No clue what the new prop part # is.
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Old 01-17-2015, 09:30 PM   #30
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I just had a SidePower bow thruster installed. It's winter so I've only used it a couple times. But, it makes a lot of noise; SE80/185 12v model. The noise sounds like what you might hear from a bad bearing or gears. This can't be the case with a new unit so I'm guessing cavitation. The blades appeared to have enough clearance in the tube at installation and the job was done by a very respected yard. Any advice?

Look at it this way.....

The thruster sounds way better than the sound of crunching fiberglass against the dock!

HOLLYWOOD

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Old 01-21-2015, 07:37 AM   #31
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Look at it this way.....

The thruster sounds way better than the sound of crunching fiberglass against the dock!

HOLLYWOOD

Excellent point!
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Old 01-28-2015, 05:13 PM   #32
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Found this on a boat in my marina, no big hole required. Pretty badly corroded. Looks like the owner did not understand what zincs were for.
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