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Raymarine A65 Combo. Sonar has never worked properly since initial install by boat maker. The depth is intermittent when it works at all. Sometimes it works at speed, sometimes at rest. Sometimes in shallow water, sometimes only in deep. We have changed the position of the transducer, even going so far as to send a photo of the transducer placement to the Raymarine representative. He recommended changing the position of the transducer one more time so it would follow the profile of the bottom of the boat (i.e. at about a 20 degree slope off of level, thought this was weird, but it worked for awhile). The only thing that we see wrong is that the plastic lock nut which secures the transducer wire into the bottom of the digital converter box(?) was crushed upon installation. The wire seems secure, but...

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SOURCE: Raymarine A65

When the engine starts, there is a voltage drop as the starters crank, followed by a power surge as the alternators kick in and the voltage comes back up.

Ferrites are only there to prevent RF (Radio Wave) interference from other onboard devices.

You should either:
-add an isolated battery to the boat to service only your electronics. That way it is unaffected by the starters.

-There are several devices on the market like Newmar Power's "Start-Gurad" that automatically switch electronics to backup power during engine start. They work great and the electronics don't skip a beat.

Posted on Dec 28, 2007

  • 1 Answer

SOURCE: A65 Transducer

jmiller,

Sound like your getting turbulence from the hull or your angle is allowing cavitation under the transducer. Look under the hull where the traducer is mounted and look for a part that has no obstruction including saltwater pickups, hull relieves, etc. The other thing to check is to take a strait edge on the bottom of the transducer to ensure the angle is slightly forward than the hull.

Bob

Posted on Dec 27, 2008

  • 111 Answers

SOURCE: raymarine a65 transducer 200kh fine 50kh not reading bottom

Sounds like your transducer either has drifted off frequency (age or been hit) Or your a65 is not able to transmit at that frequency. You should take it to a dealer with a Fish finder simulator and have it checked out before you go through the painstaking grief of a new transducer.

Posted on Jan 22, 2010

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Sonar intermittent very good through hull transducer , sonar works sometimes then will not work rest of day ,


Check the mounting location, check the cord connections, make sure the ducer is actually clicking when it is not working, otherwise either the unit or the ducer is going bad

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1 Answer

My fishfinder will not continue to read shallow depths as well as in shallow depths when drifting and occasionally running across the water. My unit is a lowrance 522c color gps/fishfinder.


Hello. Your observation is spot on and it is actually a characteristic that is always true when using sonar. Yes, your Lowrance uses the same sonar as a nuclear powered submarine does. The two factors you focus on, water depth and boat speed are perhaps, the two biggest factors when it comes to the quality of the fishfinder. The boat's engine should be in gear at an idle or just above. Experiment with your boat to find the best throttle location for good arches. Usually, a slow trolling speed works best. The depth of the fish can determine if the fish will arch on the screen. If the fish is in shallow water, the fish is not in the cone angle very long, making it difficult to show an arch. Typically, the deeper the fish, the easier it is to show an arch.
If you would like a complete tutorial on Lowrance sonar, go to this link. Enjoy. http://www.lowrance.com/Support/Tips-and-Tutorials/Sonar-Tutorial/

Nov 20, 2009 | Sport & Outdoor - Others

1 Answer

Hello! Our Raymarine A65 will not start up. It starts a boot process but does not show "Raymarine A65" on the display and no chart is displayed as it usually does. Regards Odd


Probably a bad printed circuit board, just had to send mine in to have it repaired. When I hit the power button, I did hear a beep, but then nothing displayed. Mine was still under warrenty, so don't know the repair cost if yours is not.

Jul 15, 2009 | Raymarine A65 Combo GPS...

1 Answer

Proper set up for lowrance sonar


Where do you use your boat?

There are so many variables it's hard to fit it all here, but there are some excellent tutorials on the Lowrance website. The most important thing is to pick the right frequency, for the depth of the water. (200khz for less than 70', and 50 khz for greater depths). Depending on how serious you are about fishing, there are a lot of extras that you may never use. The key is to figure out which features will help you the most and forget about the rest.

You may also get some help at this link: FixYa Service Directory

It's common for SONAR to lose contact with the bottom at high speeds. The better the transducer installation, the faster you can go. Turbulence and bubbles will cause the SONAR to drop out. Lowrance's transducer installation guide explains it very clearly.

Jan 03, 2009 | Boating

1 Answer

Sonar not working properly, intermittent


Generally, that indicates air bubbles in the water under the transducer. If you have a transom-mount transducer, make sure the bottom surface is level or angled slightly down. If you have a thru-hull, make sure your bottom is fairly clean in that area.

Oct 20, 2008 | Garmin GPSMAP 440 Chartplotter GPS with...

1 Answer

A65 Transducer


jmiller,

Sound like your getting turbulence from the hull or your angle is allowing cavitation under the transducer. Look under the hull where the traducer is mounted and look for a part that has no obstruction including saltwater pickups, hull relieves, etc. The other thing to check is to take a strait edge on the bottom of the transducer to ensure the angle is slightly forward than the hull.

Bob

Sep 11, 2008 | Raymarine A65 Combo GPS...

1 Answer

Sea talk failure


Remove all wiring from 4000 head, hook up only 12V, if seatalk fail continues, it is the head. if seatalk fail goes away, hook in instruments one by one until the bad head is found. Seatalk is 12V red, Ground Screen(bare wire) and Data yellow (pulsing voltage). good luck 847-746-0100 John Barry

Jul 14, 2008 | Raymarine A65 Combo GPS...

3 Answers

RAYMARINE


With the charts page up, start by hitting the find ship softkey at the bottom of the screen.If that find the boat on the chart all is good.If not you need to check you have a GPS fix. Go to GPS screen and see you are seeing satalites.
If all is good when you hit find ship and the boat disappears again from chart while underway you will need to go into the chart setup menu and see if the screen amplifier is turned off. If off turn on.This is first place to start. Hope that helps

Jul 13, 2008 | Raymarine A65 Combo GPS...

1 Answer

No depth reading while on plane.


Depending on your transducer type, you may have a liquid filled type that simply needs refilling. If this is the case check for leaks and get it redone. If not it could be transducer placement or cavitation under the hull.

Jun 18, 2008 | Raymarine A65 Combo GPS...

1 Answer

Raymarine A65


When the engine starts, there is a voltage drop as the starters crank, followed by a power surge as the alternators kick in and the voltage comes back up.

Ferrites are only there to prevent RF (Radio Wave) interference from other onboard devices.

You should either:
-add an isolated battery to the boat to service only your electronics. That way it is unaffected by the starters.

-There are several devices on the market like Newmar Power's "Start-Gurad" that automatically switch electronics to backup power during engine start. They work great and the electronics don't skip a beat.

Nov 16, 2007 | Raymarine A65 Combo GPS...

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