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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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Posted on Jan 02, 2017

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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

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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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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.

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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.

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