Topic: Interference problem...

[Onur]

Hi,

I have 898c si unit.
It works very nice, while stopping and motor not working.
When i startup the engine, problem begins.
Please watch the video.
I look forward to your suggestions.

Humminbird Si unit with Airmar TM260

[sonar2000]

Check wiring cables...make sure good connections.

The hb should have its own battery or at least separate from the motor and/trolling motor.

there are chokes you can buy also..search the forum for chokes....

chuck

[Onur]

Thank you Chuck.

I searched the forum, but my english is not very good, I could not understand many things well.
There are two products I could find. TMC-1 and PC 11
I understand that, TMC-1 is for trolling motors.
Can I use it in my outboard motor.
Is my problem will solve with these products?

[sonar2000]

I have been told I dont speak good english  either. 

Which model of Airmar 260 do you have? 

Is it for the HB unit?

Or is your transducer an HB ducer?

Chuck

[Onur]

Airmar TM 260
I guess it is a universal ducer.
It fits to my unit with a mix&match cable.

[sonar2000]

ok......I guess the ducer may not be an issue

thanks

chuck

[Humminbird_Greg]

Thank you Chuck.

I searched the forum, but my english is not very good, I could not understand many things well.
There are two products I could find. TMC-1 and PC 11
I understand that, TMC-1 is for trolling motors.
Can I use it in my outboard motor.
Is my problem will solve with these products?

From the looks and sounds from your video I would say that you are getting trim and main motor interference.  The best option here may be as Chuck stated and power your 898c Si unit off of a separate battery that is not connected to anything else on the boat.  Keep all of the wires from the 898 as far away as possible from the main motor, the batteries it is charging or connected to and any power wires that run up to the console.

Your 898 unit should have come with the PC-11 which is the power cable that has the built-in choke in it (this is the black ball looking thing on the power cable).

The TMC-1 is for trolling motor interference only.

[Humminbird_Greg]

ok......I guess the ducer may not be an issue

thanks

chuck

It could be depending on how it is shielded it could be more susceptible to interference than the stock transducer is.  This is especially true at the adapter wire connectors.

[sonar2000]

OK, I will recind the post. 

Is it possible to swap your unit with another boat and use a different transducer.

Chuck

[Onur]

From the looks and sounds from your video I would say that you are getting trim and main motor interference.  The best option here may be as Chuck stated and power your 898c Si unit off of a separate battery that is not connected to anything else on the boat.  Keep all of the wires from the 898 as far away as possible from the main motor, the batteries it is charging or connected to and any power wires that run up to the console.

Your 898 unit should have come with the PC-11 which is the power cable that has the built-in choke in it (this is the black ball looking thing on the power cable).

The TMC-1 is for trolling motor interference only.

Greg thanks for your interest.

I think my power cable is PC-10.Because there is no ball looking thing on it.
I called my dealer and they will send a PC-11 cable soon.

On the other hand, i will try to connect the unit to a battery which, is not used with any other devices with the existing cable.

@chuck

This is my new boat.
My old boat had 25hp outboard without ignition and manuel trim.
Ducers had been mounted similarly.
At These days, i didnt have any problem.
Unit was working flawlessly.

[Onur]

By the way, i forgot to say.
Same interference happening with stock transducer on both, si screen and normal screen.

[sonar2000]

Lets start with baby steps.

I would think the first step is to get the unit on its own power supply (battery)..

The second is to keep wires separated from other device wiring.


Lets  go from there..

Chuck

[Onur]

Ok Chuck,

I will try but as you can see in the picture below, all wirings are at the back side of the steering wheel.
I have no chance to seperate all cables too much, maybe 15-20 cm.

[sonar2000]

Yep, not a lot of room.  But you will do fine...

Bob b mentioned a couple of things.
Wiring, if possible use a twisted stranded 12 or 14 gauge wire.
Use copper wire and not aluminum.
Make good connections.

Dont forget to fuse the positive side with at least a 3 amp fuse.
Use a good marine fuse.

Chuck

[Onur]

Problem was 90% solved.

Device connected to a seperate battery and used a high quality copper wire with 7 amp marine fuse.

While engine is running or trimming up, there is no problem.

While trimming down, there have been a little interference.

Now, I am waiting my dealer to send PC-11 power cable.

I hope this cable will totally solve the problem.

[sonar2000]

Good news....

Let us know how the cables work.

And now to take some pictures of the sonar scans...
Let us see your results..

Chuck