Got a 93sv up front for sidevu and downvu. It is networked to the console 93 and uses the gt56 in the back. When the trolling motor is used, the image gets all sorts of interference. All the cables are in the bow and are individually wound, ziptied lightly and wrapped with tinfoil. Any ideas?
2012 Ranger Z521 2023 Mercury 250 Pro XS
Where do the electronics in the bow get their power? Is there interference when the motor is running on 100%?
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
I have the same issue with my helix units. I’m wondering if the noise is coming through my 2d transducer attached to the bottom of the motor.
Nitro z21
Any speed causes the interference. '12 z521 so there is a panel up on the bow. Trolling motor power runs up port side from batteries to bow. Power cables then run to the center where the pedal is and out to the port side again. Graph, power and other cords are as far to the starboard side as possible.Originally Posted by CatFan
2012 Ranger Z521 2023 Mercury 250 Pro XS
Different issue since my transducer is in back and this graph is connected via ethernet. No transducer connected
2012 Ranger Z521 2023 Mercury 250 Pro XS
If there is interference when the TM is on 100%, then there is likely something wrong with the motor.
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
Don't overlook actual RF through the air. It usually requires a torrid choke(on the transducer cable) right at the input to the MFD to eliminate it. Also a note on neatly tied and wrapped cables, Zip tying or any other method of tightly binding cables together actually increases the likelihood of induced noise. Coiled cables should be formed in a figure 8 to help prevent transmission of noise. Those are some know things that has helped others. CatFan makes a good point with the speed 10. The speed control(PWM) pulsing is not used with the prop speed of 10 selected. The absence of noise at that speed indicates the PWM pulsing is your culprit and these or other fixes are needed. If your noise is still present at "10" it may be another source other than PWM. JMO Bob
Tell me where has a slow movin' once quick draw outlaw got to go
Next time out remove the charger leads from the battery powering the graphs. If that clears up your problem them you need a choke between the charger and battery
Ran the TM at 10 today and it was not interfering.
2012 Ranger Z521 2023 Mercury 250 Pro XS
I'll tear into the wiring up front this winter and redo it. I need to make a list of the fixes you gents are giving because they are easily lost in a thread
2012 Ranger Z521 2023 Mercury 250 Pro XS
I'm confused. How do the charger leads in the back of the boat affect the graph on the bow when the TM is running?
2012 Ranger Z521 2023 Mercury 250 Pro XS
Some chargers, notably NOCO, are known to couple noise between the TM batteries and cranking battery.
But, there would be no noise on the TM battery when running it at full power.
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
My TM died last week due to water intrusion and the dealer replaced the armature and other parts with used ones. You think that might be it?
2012 Ranger Z521 2023 Mercury 250 Pro XS
Are you past warranty? Used parts put more possibilities in the puzzle. A missing ground or a blown ground fuse(brown wire with fuse in the TM head) will cause bad interference. I would check that first if you had no noise before the intrusion. JMO Bob
Tell me where has a slow movin' once quick draw outlaw got to go
Just ordered new parts tonight. Going to have a talk with the shop about the used parts and charging me $225. I'll test it after the new parts are installed and let you know
2012 Ranger Z521 2023 Mercury 250 Pro XS
Tore the tm apart and it was full of water(again) and the 3amp fuse was blown. Get parts next week and I'll report back. Thanks for all the great help!
2012 Ranger Z521 2023 Mercury 250 Pro XS
I have the same setup as you. I took a computer mouse pad and cut a piece to fit between the transducer and trolling motor. Cured my problem. I understand this works for a few folks but most it does not. It is an easy cheap try!
Good idea. I don't have a ducer on the tm. The graph is networked thru the console to the gt56 in the back
2012 Ranger Z521 2023 Mercury 250 Pro XS
Call Minn kota, there is a kit with new seals. You don't want to get water in again. I would suggest having a Minn Kota ASC do it, but it is your money.
Tell me where has a slow movin' once quick draw outlaw got to go
Got the kit with seals. Being done by authorized dealer so if it leaks again, I can blame someone else :) just replaced the fuse. Step 1 done.
2012 Ranger Z521 2023 Mercury 250 Pro XS
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