Go Back  The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > Marine Electronics Forum
Reload this Page >

B744V —Thru-Hull Multisensor not reporting correct speed...

Notices

B744V —Thru-Hull Multisensor not reporting correct speed...

Old 08-05-2013, 11:30 AM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jan 2013
Location: Long Island, NY
Posts: 151
Default B744V —Thru-Hull Multisensor not reporting correct speed...

I even bought a new speed insert (AIRMAR 20-752-1) to test it.

It gives the same bad (low) reading as the original insert. We are talking about < 50% of what my GPS is reading.

Anybody have any ideas what could cause this?


TIA

Jeff
Jeff_C is offline  
Old 08-05-2013, 11:45 AM
  #2  
Admirals Club Admiral's Club Member
THT sponsor
Marine Advertiser
 
Join Date: Oct 2009
Posts: 21,657
Default

What sonar are you using?
semperfifishing is offline  
Old 08-05-2013, 11:52 AM
  #3  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jan 2013
Location: Long Island, NY
Posts: 151
Default

Originally Posted by semperfifishing View Post
What sonar are you using?
I have a Raymarine system with E120 and E80 displays with ST6002 Autopilot and ST60 Graphics Display.

Does that answer the question?

Thanks,
Jeff
Jeff_C is offline  
Old 08-05-2013, 01:41 PM
  #4  
Admirals Club Admiral's Club Member
THT sponsor
Marine Advertiser
 
Join Date: Oct 2009
Posts: 21,657
Default

The B744V-INS-ST Is the speed insert I would use if you have the clovis pin on your unit.
That is for B744V unit used with the Raymarine ST series instruments.
semperfifishing is offline  
Old 08-05-2013, 03:59 PM
  #5  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jan 2013
Location: Long Island, NY
Posts: 151
Default

I bought what seemed to be the direct replacement for what the boat came with...now I know why they both don't work correctly: http://www.blueheronmarine.com/Airma...for-B744V-6905



Yes, I have the Clovis pin.

Don't seem to be able to find the insert you suggested by itself with that part no so far

Any idea on a source?

Thanks,
Jeff
Jeff_C is offline  
Old 08-06-2013, 08:43 AM
  #6  
Senior Member
 
Join Date: Aug 2006
Location: San Diego
Posts: 3,149
Default

FWIW, my recent experience suggests that these S/T inserts are problematic. My temp went south so I installed a new insert. The temp was then perfect, but I lost my paddlewheel speed entirely. I pulled the insert and self tested it for speed (as per instructions) and it failed. I returned it to GEMECO and they tested it as good. I gave up and bought a new B744V. That fixed everything.
Pez Vela is offline  
Old 08-06-2013, 09:03 AM
  #7  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Jan 2013
Location: Long Island, NY
Posts: 151
Default

Yeah. That's what I am afraid of. Apparently I already wasted money on one insert and I could buy another of a different type and then have the same problem. Replacing the B744V would be a big deal and I already get SOG via GPS so it won't get me much.
Jeff_C is offline  
Old 08-06-2013, 11:11 AM
  #8  
Senior Member
 
Join Date: Aug 2006
Location: San Diego
Posts: 3,149
Default

For me, speed-thru-water was a big deal so I bit the bullet. I'm on a trailer, so the replacement of the entire 'ducer was not complicated by requiring a haul out. And yes, the money I spent on the insert generated a distinct flushing sound. Mine was for an old B44V (the predecessor of the B744V) and if anyone wants it (although I don't know why), it may be laying around here somewhere.
Pez Vela is offline  

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 On
Refbacks are Off


Thread Tools
Search this Thread