I have a E7D MFD with radar and a P79 (thru hull) transducer. My boat is a Seahunt 234, less than one year old. MFD installed upon purchase. Shortly after we got the boat, I noticed the MFD was picking up a depth  reading intermittenly. Last few times I took the boat out, it displayed no readings. frustrating. We've had no fish finding capability. Yesterday, while I was washing the boat I noticed a reading. Is there something I should look at/for that may be causing a fault.  Thanks

Views: 201

Reply to This

Replies to This Discussion

Welcome to the Raymarine Technical Forum Bernie,

Please note that fishfinders are not designed to return a bottom image or depth value when the hull is out of the water.  Begin by checking the following two items:

  • verify that the transducer reservoir is filled as the transducer is designed to transmit energy through the hull via a fluid medium (typically RV antifreeze)
  • verify that the P79 transducer has been selected within the MFD's transducer configuration settings (HOME->FISHFINDER->MENU->SET-UP->TRANSDUCER SET-UP->TRANSDUCER)
  • verify that the transducer is pinging (an automobile diagnostic stethoscope may be helpful in listing to the transducer)

Transducer location is critical to maximizing the performance of the system.  It is also important to periodically check in-hull transducer reservoir fluid levels to ensure that they are full.  Also, when operating in depths greater than 180', the 50kHz frequency is recommended.

From a performance standpoint, properly installed thru-hull transducers will typically deliver the best performance.  The performance of in-hull transducers may be as much 20% lower than a thu-hull of similar transmitting element design.  As hull designs, materials, thickness, and other factors differ, performance of in-hull transducers will vary between boats.

In order to install an in-hull transducer, the following minimum hull requirements must be met:

  • the hull must be constructed of solid, non-cored fiberglass in the location where the transducer will be installed.
  • the hull must additionally be less than 1" thick in the location where the transducer will be installed
  • the hull must not feature hull aerating steps (if so, the transducer must be located forward of the step.  Owners must recognize that such an installation location may cause the section of the hull below the transducer to loose contact with the water when the hull lifts while operating at high speed)

Before bonding the transducer reservoir to the hull's inner surface, it us recommended that this location be tested first.  In choosing the transducer mounting location, it is recommended that baseline performance of the fishfinder/transducer be established with the transducer held over the side of the vessel while the vessel is stationary and in water having a depth of at least 30'.  Suspending the transducer in this manner can also be used to test to operation of the DSM.  A series of snapshots of the fishfinder's image should be taken as a baseline to then compared the performance of proposed transducer installation location(s) while trolling, while on plane, and at high speed.  One would then rest the transducer on a ZipLock bag which has been filled with water (purge all air) and temporarily placed on the inside of the hull in the area where the transducer performance will be tested.  Transducer site testing should be performed while the vessel stationary, trolling, and when on plane until the best transducer installation location is determined.  After testing has been completed and the best installation site determined, then the transducer reservoir may be fastened to the inside of the hull per the transducer installation instructions.

Reply to Discussion

RSS

Events

Videos

  • Add Videos
  • View All

Photos

Loading…
  • Add Photos
  • View All

Latest Activity

David English replied to David English's discussion RL70C Plus integration with Standard Horizon GX2200 VHF/AIS/DHC
"Is there a C/E Series classic MFD that will work with the ST60 series instruments, Pathfinder Radar Scanner, and ST5000 plus autopilot?  Maybe I should look for a used MFD to upgrade from the RL70C plus hsb2? Thanks, David"
2 hours ago
mnk replied to mnk's discussion MFD C-70 classic firmware upgrade from 5.04 to 5.16 breaks waypoint tracking function with ST6002
"i did not perform the reset to the factory settings. why should i?"
3 hours ago
Harry Vandermeer liked Harry Vandermeer's profile
5 hours ago
Harry Vandermeer liked Harry Vandermeer's profile
5 hours ago
Rick Wyzykowski posted a status
"same c80 I did upgrade and r130 converter instal on. in gps tatus , no satelites or icons , time of day wrong"
6 hours ago
Mark Hundhausen left a comment for Matt Alden
"Matt. West Marine replaced two transducers and that still didn't fix the sea temp. I sent everything back to Raymarine to be tested and they replaced the display under warranty. Everything works great again. I hope this gets you back on the…"
6 hours ago
Mark Hundhausen and Matt Alden are now friends
7 hours ago
Doug Brown replied to Doug Brown's discussion Digital Sounder Module connected to E90 display
"I forwarded 3 pics, but only the network switch displayed. The DSM unit is the one that is getting very hot. It was installed for several years in the same location and worked fine. When it gets hot, it malfunctions. We purchased a CP300, but it…"
7 hours ago
haim boiangiu replied to haim boiangiu's discussion spx-5 auto pilot
"Did all of that 5 times over including replacing the fuses that came with the computer. My question is should I supply power to the sea talk on the computer and is there away to check if the computer is on. The two terminal next to the motor drive…"
8 hours ago
Matt Andrews replied to Russell Baine's discussion CP450C v3.09 won't update to v4.03 from my e125 v9.40
"I had to send mine back to them but performance was actually worse with 4.03. I now have increased bottom tracking issues and a white blank square that shows up on the screen periodically about 2 inches tall and 3 inches wide or more. Supposed to…"
9 hours ago
Mircea Tomus replied to haim boiangiu's discussion spx-5 auto pilot
"Since the control head doesn't seem to work, and the motor doesn't run, how do you know that the computer is working? Make sure you check the fuses (there are two of them) on the computer and that you feed the power leads in the…"
9 hours ago
Moderator - Raymarine, US replied to Charlie Caplinger's discussion Autopilot ST8001
"Welcome to the Raymarine Technical Forum Charlie, According to the Repair Center's Flat Rate schedule, the Repair Center can still service the ST8001."
9 hours ago
Moderator - Raymarine, US replied to Mike Newbury's discussion e7
"Mike, Unfortunately, we don't have access to repair records.  You may call the Repair Center at 603.324.7900 to request a status update on your e7."
9 hours ago
Moderator - Raymarine, US replied to Shaun Ruge's discussion Temp constantly showing 32 degrees F
"Shaun, Powering down the entire system, removing the iTC-5, and then powered the entire system back up should permit the CP100 to supply the system with water temperature data. "
9 hours ago
A Winslow replied to A Winslow's discussion Troubleshooting wind instrument
"No, there are no other splices. And the other question is, why is the supply power below 8?  Is that okay?  Understand, this is a brand new pod."
9 hours ago
Moderator - Raymarine, US replied to Kenneth Miller's discussion Contact corrosion inhibiter
"Welcome to the Raymarine Technical Forum Ken, Yes.  Dow Corning DC 4 is quite commonly used for this purpose."
9 hours ago

© 2014   Created by Moderator - Raymarine, US.   Powered by

Badges  |  Report an Issue  |  Terms of Service