Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 11-04-2017, 05:22   #1
Registered User
 
RichandHelen's Avatar

Join Date: Sep 2013
Location: Miami
Boat: 2012 Tartan 47
Posts: 221
Bow Thruster Dims The Lights

When I use my bow thruster all of my lights dim - from my nav lights to the image on my GPS. What's going on?
__________________

RichandHelen is offline   Reply With Quote
Old 11-04-2017, 05:42   #2
Registered User
 
svHyLyte's Avatar

Join Date: Mar 2006
Location: Tampa Bay area, USA
Boat: Beneteau First 42
Posts: 3,900
Images: 25
Re: Bow Thruster Dims The Lights

The device evidently pulls so much power, there's a voltage drop in your overall electrical system.
__________________

__________________
"It is not so much for its beauty that the Sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
svHyLyte is offline   Reply With Quote
Old 11-04-2017, 05:54   #3
Registered User
 
ranger42c's Avatar

Join Date: Aug 2012
Location: Maryland, USA
Boat: 42' Sportfish
Posts: 4,102
Re: Bow Thruster Dims The Lights

And the bow thruster is apparently serviced by the house bank of batteries.

Could also be that the battery bank capacity is insufficient for overall loads, or maybe the batteries are old or undercharged or both...

-Chris
__________________
Selby Bay, South River, Chesapeake Bay, USA.
ranger42c is offline   Reply With Quote
Old 11-04-2017, 06:10   #4
Registered User
 
rwidman's Avatar

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Bow Thruster Dims The Lights

Is this something new or has it always done this?

If it's something new, your batteries are probably getting weak or they are not being charged properly. It's also possible that the connections between your batteries and the distribution panel or ground are loose or corroded.

If it's always done this, it could be any of the above or it could be that you never had enough battery capacity in the first place.

Bow thrusters draw a lot of current.
__________________
Ron
HIGH COTTON
Sent from my laptop using Windows 7
rwidman is offline   Reply With Quote
Old 11-04-2017, 06:48   #5
Registered User

Join Date: Jan 2010
Location: Narragansett Bay
Boat: Able 50
Posts: 3,130
Re: Bow Thruster Dims The Lights

That's normal. Electric winches and the anchor windlass would do the same.
savoir is offline   Reply With Quote
Old 11-04-2017, 08:17   #6
Registered User

Join Date: Dec 2016
Location: Buenos Aires
Boat: SOLD
Posts: 121
Re: Bow Thruster Dims The Lights

What type, brand, etc..? Coud be that brushes are worn out or dirty, short circuit in the winding, loose contact, dying batteries, lack of grease,and the list goes on forever.

In your car, when your battery is low or dying and you hit the start lights go down, but when it's ok you wont notice it.


Mariano

Fair winds
Mariano is offline   Reply With Quote
Old 11-04-2017, 12:13   #7
Registered User

Join Date: Jan 2008
Location: SF Bay Area (Boat in La Paz)
Boat: Valiant V40
Posts: 625
Re: Bow Thruster Dims The Lights

Many folks install a dedicated battery close to their thruster and/or windlass to both ensure full voltage at the motor and minimize the drain on their main electrical system.
jamhass is offline   Reply With Quote
Old 11-04-2017, 12:23   #8
Registered User

Join Date: Sep 2015
Location: Essex, England
Boat: Hartley Tahitian 48
Posts: 334
Re: Bow Thruster Dims The Lights

Quote:
Originally Posted by jamhass View Post
Many folks install a dedicated battery close to their thruster and/or windlass to both ensure full voltage at the motor and minimize the drain on their main electrical system.


^^^^^^^

This
paulajayne is offline   Reply With Quote
Old 11-04-2017, 18:12   #9
Registered User

Join Date: Sep 2012
Location: Atlantic City NJ
Boat: Beneteau Oceanis 48
Posts: 42
Re: Bow Thruster Dims The Lights

Mine has 4 dedicated gel batteries and still does it, along with heavy use of winches or windlass
chris4911 is offline   Reply With Quote
Old 11-04-2017, 18:36   #10
Registered User

Join Date: Nov 2014
Location: Falmouth, UK
Posts: 207
Re: Bow Thruster Dims The Lights

Quote:
Originally Posted by RichandHelen View Post
When I use my bow thruster all of my lights dim - from my nav lights to the image on my GPS. What's going on?
Does it also do it when the engine is running?
wiekeith is offline   Reply With Quote
Old 11-04-2017, 18:38   #11
Registered User

Join Date: Aug 2016
Location: Bainbridge Island, WA
Boat: Hallberg Rassy 39
Posts: 95
Re: Bow Thruster Dims The Lights

Glad you brought this subject up because my thruster has been pulling the voltage down to 8.3v when activated for a few seconds. Fully charged bank of 5 AGM batteries. SidePower folks say it should be above 9.6, if I recall. The motor is off to be checked, although it looked like the brushes were fine, the shaft spun smoothly, as does the prop shaft. Relay contacts were dirty, but would that cause huge power draw? FYI, the batteries load tested fine and connections good. 8 large cables go from batteries in aft cabin to bow thruster, so I don't suspect much line drop. I'll try to post again once I get word from Imtra whether there was an issue with the motor.
Mr O is offline   Reply With Quote
Old 11-04-2017, 18:39   #12
Registered User
 
rwidman's Avatar

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Bow Thruster Dims The Lights

Quote:
Originally Posted by jamhass View Post
Many folks install a dedicated battery close to their thruster and/or windlass to both ensure full voltage at the motor and minimize the drain on their main electrical system.
Electrically, this is much more complicated than this post would make it seem.
__________________
Ron
HIGH COTTON
Sent from my laptop using Windows 7
rwidman is offline   Reply With Quote
Old 11-04-2017, 18:46   #13
Registered User

Join Date: Aug 2016
Location: Bainbridge Island, WA
Boat: Hallberg Rassy 39
Posts: 95
Re: Bow Thruster Dims The Lights

Quote:
Originally Posted by jamhass View Post
Many folks install a dedicated battery close to their thruster and/or windlass to both ensure full voltage at the motor and minimize the drain on their main electrical system.


Yes, the tech support folks at Imtra (SidePower) suggested that I consider installing a separate battery bank near thruster. Not deep cycle, but starting batteries. Makes sense since it's similar situation to starting an engine: high cca's and short load cycle.
Mr O is offline   Reply With Quote
Old 11-04-2017, 19:12   #14
Registered User
 
rwidman's Avatar

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Bow Thruster Dims The Lights

Quote:
Originally Posted by Mr O View Post
Yes, the tech support folks at Imtra (SidePower) suggested that I consider installing a separate battery bank near thruster. Not deep cycle, but starting batteries. Makes sense since it's similar situation to starting an engine: high cca's and short load cycle.
Read my post above. You can't just run a pair of wires to it from the other batteries to keep it charged.

Unless your boat has always done this, something has changed and you should find and fix it.

You mentioned something about "large wires" from the batteries to the thruster. Perhaps the wires are just not large enough. Ask the folks at Imtra what gauge the wires (cables) need to be for that distance and back.

Quote:
so I don't suspect much line drop
Don't "suspect", measure the trop at the battery and the drop at the thruster.
__________________
Ron
HIGH COTTON
Sent from my laptop using Windows 7
rwidman is offline   Reply With Quote
Old 11-04-2017, 19:46   #15
Registered User

Join Date: Aug 2016
Location: Bainbridge Island, WA
Boat: Hallberg Rassy 39
Posts: 95
Re: Bow Thruster Dims The Lights

Quote:
Originally Posted by rwidman View Post
Read my post above. You can't just run a pair of wires to it from the other batteries to keep it charged.

Unless your boat has always done this, something has changed and you should find and fix it.

You mentioned something about "large wires" from the batteries to the thruster. Perhaps the wires are just not large enough. Ask the folks at Imtra what gauge the wires (cables) need to be for that distance and back.

Don't "suspect", measure the trop at the battery and the drop at the thruster.


True, but this is a factory install which has not had problems until recently. The gauge of the wires is not suspect.
__________________

Mr O is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale: Vetus BOW-160 bow thruster motor 157hunt Classifieds Archive 0 28-10-2015 08:19
Bow Thruster bottleinamessage Propellers & Drive Systems 33 11-11-2011 02:21
Bow thruster lbarnes Propellers & Drive Systems 7 24-08-2008 08:10
Bow Thruster for CSY 44 Capt'n Harry Monohull Sailboats 7 04-09-2007 10:17
What No Bow Thruster Pura Vida Off Topic Forum 3 02-05-2007 19:23

Advertise Here


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:48.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×

ShowCase vBulletin Plugins by Drive Thru Online, Inc.