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install question on twin Yamahas

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install question on twin Yamahas

Old 05-13-2019, 07:59 AM
  #1  
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Location: Sienna Plantation, TX.
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Default install question on twin Yamahas

I am ready to wire up my FELL MOB that I got on Black Friday...

I had twin Yamaha HPDI 200s. I do not need to use the stock cut off switch. I was prepared to snip the 2 grey and black wires for the switch and connect them to the orange and grey wires on the FELL. I have been reading others has issues when turning off one motor by key, the other motor would also quit. I often do slow speed trolling, so sometimes I will have to kill 1 motor to get down to the speed I want. Is there a way to wire these so that my 2nd motor does not quit?

Also, in terms of powering the unit. Would it make more sense to power it from a steady source (battery switch)? Or into the ignition so it turns on with the key?

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Old 05-14-2019, 06:16 AM
  #2  
C3D
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Did you get the multiengine kit? I have a twin Yamaha and used that kit to avoid this issue. Not sure if it’s needed if you have a two key setup.

https://www.westmarine.com/buy/fell-...-kit--18753566
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Old 05-14-2019, 06:41 AM
  #3  
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the issue is, the engine stop circuits are separate from each other

the kill switch has four wires - a white, and a black, for each engine -
the Yamaha kill switch closes both pair simultaneously

but if you tie both pairs into the single pair of the Fell,
they are now in parallel -
so stopping one engine with the key also ends a stop signal to the other

that's what the Fell relay device, linked above, prevents.

If you you power the Fell with the key switch,
to start the engines you will always have to go:
key on,
pause while the Fell boots up and you activate it with the fob -
then turn the key to crank / start.

Personally I prefer to have the Fell powered with the main battery switch
and not worry about it as I stop/re-start the engine throughout the day.
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Old 05-15-2019, 11:36 AM
  #4  
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Thanks to both of you. The multi engine relay seems like the easy button for this project.
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