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Gentleman, I watched a u tube video on early spring coho trolling, in the video he talks about on outside lines using out riggers or planer boards ,he runs flasher and peanut fly. But he didn't say how far back to run or if he run with or without kneel weight. He stated the coho are attracted to the flasher and fly, if they don't strike the fly, they will often swim into the other flat lines with stick baits and hit them. So my question is with or without kneel weight and how far back from board or outrigger.  Any help is greatly appreciated. I think early spring last year I was running my lures to deep.  I'm planning on concentrating on top third of water depth.

Depends on the depth you're fishing. Say you wanna run it 10' down, I'd say run that flasher back 10', snap a 2oz weight on, run it another 15-20' back, then clip the board on. 

You will definitely need a weight if you wanna run a flasher on a board. Precision trolling app has small weights like 2-3oz that will tell you all the details you need.

We run them with 1/2 - 5/8 keel back 30-50 feet with success.  

I'm small time for sure, but I've had my best success with flasher/peanut on 2-4 colors of lead core. I haven't played with keel weights yet, this. 

I use 5/8oz keel weight and run 25-35 behind the board with dodger /fly.  I also like to keep a tighter spread earlier in the year. Coho are curious and like the noise, the splash of the board in the water( I know they make rattles in some boards too) and have seen and caught them in the prop wash of the motor. Good luck out there and be safe

You are figuring this out!  If you don't use an inline sinker a few feet ahead of a small dodger, the dodger will just skip along the surface like you are dragging  a stick. In the "early" spring - now through most of April, the exact weight size is quite insignificant.  I doubt there would be much difference in catch between a half ounce or one ounce.  Both will catch equal numbers of fish. I doubt in actual use, again, in the spring, it makes little difference if the D/F is running one foot under the surface or two feet.  As long as it stays in the water, it will work. 

You are right in targeting the top third - actually, for earliest spring (March-early April) target the top 4 or five feet.  

Drop back from the planer board or tether line is insignificant only to prevent tangles.  I run 50 feet almost all the time.  If you have one running 30 outside another running 60, the outside line will likely tangle with the inside line when a fish bites the shorter, outside line.  I run them all the same so when the fish bites, it automatically drops back behind the closer-to-the-boat lines.  

Nothing wrong with running 2 to 4 colors instead of a keel weight, I suppose if all the lines are running them, but why bother and especially for those guys stuck on inline planer boards which take much of the fight out of a spring coho, why compound that by putting four colors of lead core between you and the fish.   

Just to echo what others have said, I run my dodger/peanut fly setups with 5/8-3/4 ounce inline weight. In my limited experience I find it's best to use body baits early until around mid April then the fly bite seems to really turn on until they leave the area. Have had days where all i was running was D/F and couldn't get all rods out and limited in a single pass. 

Just want to thank all of you very much for the input and help. Thanks again, can't wait be out.