Re: [Amel Yacht Owners] Bowthruster Problem

koenvelleman <no_reply@...>

Hi, You can measure the current with a clamp DC multimeter for
example DCM268 (up to 1000A in AC and DC)from Velleman Components
( Relax price is only a fraction of what You
Fair Winds,

--- In, Hanspeter B├Ąttig
<hanspeter.baettig@b...> wrote:
Dear Ian
very interesting what you mentioned.
Question? How will you messure 160 Amps on the bowhruster cabels?
With the Volt-meter and the Amperemeter clamp. Such an instrument
cost you about more the 1000$ and please calibrate it. Maybe you have
a great deal with General Electric or ABB.

Best regards and good winds
SM #16

----- Original Message -----
From: Ian Shepherd
Sent: Thursday, April 01, 2004 5:14 PM
Subject: Re: [Amel Yacht Owners] Bowthruster Problem

Hi Dimitris,

it sounds like you have overcooked the bow thruster through
prolonged use.
If you have the 10 HP motor, it will draw around 160 amps, and
with no
forced cooling in a confined space, it will get very hot after a
few minutes
operation. It is not designed for other than short bursts of

The smoke will have come from the insulative lacquer on the motor
It may be OK after a cool down period, but it's now possible
that the
insulation will break down sometime sooner, rather than later.
From what you
say, smoke comes from the motor as soon as you use it now, even
when cold?
Is this correct? If so, you may need to get the motor rewound by
a motor
repair company. I would check the current on the Link 10 when the
thruster is operated. If it's much more than 160 amps, you
probably have
damaged the windings on the motor.

The oil should not be affected, but if I were you, I would drop
the bow
thruster tube down a few inches and check to see if the shaft
turns freely.
It may just be that you have a mechanical problem which is
loading the motor
more than normal. Whilst you are doing this, check for wear
around the 4
bolt holes and make sure that the countersunk screw that holds
the brass
ring inside the tube is secure. What is the hull number of your
boat? The
design has changed recently.

I would doubt that your insurance company would pay for a repair,
but I
maybe wrong. If you say that you had to over use the thruster to
save the
boat, they may be sympathetic! Good luck.

Ian Shepherd

SM 414 Crusader

Yahoo! Groups Links

a.. To visit your group on the web, go to:

b.. To unsubscribe from this group, send an email to:

c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of

Join to automatically receive all group messages.