6 Troubleshooting Tips For Raymarine Dragonfly 7 Problems

raymarine dragonfly 7 problems
raymarine dragonfly 7 problems

Sonar units from Raymarine are not as well known as options like Garmin and Lowrance, but that doesn’t mean that these units are subpar.

It is true that the quality of Raymarine systems can’t compete with Lowrance, but you will have to pay a significantly less budget for this purchase.

Units like the Raymarine Dragonfly 7 do run into issues every now and then, but the problems with this unit are pretty basic.

That is if you are taking care of the unit properly and keeping the major problems at bay. Otherwise, the situation can surely get tricky and you’ll be stuck with a chunk of metal.

That way, you won’t have to worry about going through any extensive procedures to get the system working perfectly on your boat.

The following list of common problems with the Raymarine Dragonfly 7 will further clarify the viability of this unit for your fishing system.

6 Common Raymarine Dragonfly 7 Problems

  1. Missing Sonar Data

Anglers often complain about missing sonar units when making use of this unit from Raymarine. Most of the time, this issue is pretty simple where anglers have not updated the sonar settings.

So, there is a decent chance that you’re in the same boat with the sonar being disabled in the system configurations.

However, if that is not the case, then you’re dealing with power supply issues to the sonar system.

So, make sure to check the relevant power supply cables, and that will give you a better perspective on the Raymarine Dragonfly 7 system missing sonar data.

It is not that rare for the wiring to get damaged. If you’ve installed the sonar system yourself, then you likely didn’t secure the cables properly.

Moreover, the harsher waves do take a toll on the hardware, and you will have to get the cables secure if you wish to realize a suitable performance from this system.

Yes, it will be a hassle, but it is only a one time job (if you do it correctly that is). If you don’t have the expertise or the experience for it, then there is no need to waste your time here. 


We will always nudge you towards hiring a local expert. While he or she might be heavy on your budget in the short run, you’ll avoid a lot of hassle and realize a robust response from the system by seeking help.

So, be sure to reach out when you’re stuck.

  1. Issues With Depth Reading

When you’re running into issues with the depth reading, the issue is often related to the sensitivity settings.

It is pretty hard to find the perfect sensitivity configurations on the first go, and you need to experiment with different settings to get optimal results.

Aside from the basic configuration, you should also focus on decreasing your moving speed, as that can also play into these depth reading issues. So, make sure to manage your pace for a better experience.

  1. Display Issues

The majority of problems with the display can be traced back to insufficient power from the source. So, if you’re running into frequent resents and flickering problems, make sure to check the connection points for possible damages. 

If the connection points are actually damaged, then your only option is to clean up these points and try securing them properly with the power source.


However, if the voltage from the source is sufficient, then you need to focus more on updating the software on your device.

There is a good chance that you’re dealing with corrupted data, and updating the unit is the only solution in this situation.

With that out of the way, it is not always the power or the software or anything else for that matter.

Sometimes, you just have to check the configurations. Most owners don’t really go about adjusting the backlight or the brightness. 

If you also ignored this step or don’t know how to change the brightness, now might be a good time to access the manual.

You just have to rely on the manual and then use that to change up the brightness. It will take some of your time, but you’ll surely be able to make use of the display.

Yes, the display will draw out more power from the battery when the brightness is high. However, you are not left with many options in the high sun and you have to focus more on the visibility side of things. 

Otherwise, you’ll just be holding yourself back and the display will be partially black.

Still, there are some alternatives like erecting a shade over the display to block out the sun. so, be sure to explore your options when you’re stuck or confused.

  1. Missing GPS Position


This issue is not that common, but there have been a few reports where anglers mentioned no GPS positioning through the Raymarine system.

This issue with the Raymarine Dragonfly 7 usually presented itself in rough weather conditions or isolated geographic locations.

So, you will need to relocate and find a better spot to secure a consistent connection. There isn’t much that you can do about this issue except to focus more on finding a better location for your Raymarine system.

  1. Raymarine Dragonfly Not Starting

If you’ve installed the unit yourself, then you will likely run into the same situation. It is pretty common for inexperienced anglers to run into these complications where they miss the installation steps and don’t wire up the system correctly.

The only thing you can do about this situation is to check the condition of your fuses and breakers. You have to make sure that the system is able to draw power from the battery.

Making use of a multimeter here is not a bad idea either as it will give you a better idea of the situation. 

All that you’re trying to do here is to ensure that the power flowing through the cables and into the system is optimal. So, you can patch up the multimeter with the different contact points and then check up on the performance accordingly. 

Make sure everything is wired up correctly and the power cables are not damaged.

Aside from that, there is no harm in making use of a multimeter to narrow down on voltage-related issues. Hopefully, that will help you better isolate issues with Raymarine Dragonfly not starting.

  1. Transducer Problems

The complaints related to the transducer not working properly with the Raymarine unit can be linked with improper placement of the transducer, and you need to adjust the positioning of the transducer to get the desired performance.

Make sure that there are no problems with the cables connected with the transducer, and recheck the connection with the main device.

Overall, these were a few complications that can be expected with the Raymarine system. None of these issues are that serious, and you will be able to fix all of these issues yourself.

However, if you’re still stuck in the same problems, then call the experts from Raymarine for help.


Looking to upgrade the sonar system on your boat with the Raymarine Dragonfly 7? Just go through the pointers we’ve listed here, and you will be able to avoid some of the more common problems with this unit.

While these problems are not that serious, they sure can be annoying.

Luckily, you can just follow along all the fixes that we’ve listed here. Hopefully, you will not have to go through extensive routines or annoying errors when trying to limit these issues. 

That way, you will not have to go through the hassle on your own, and the experts will guide you through each step of the way!

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