Connecting a Kicker Motor to Fuel/Water Separator

[DerekLong]

Hi There.
I'm fairly new to the Forum and there seems to be a lot of great information available.

I'd like to ask for help with setting up my Kicker Motor (4 stroke Tohatsu 9.8HP) to run off the same fuel tank as my 4 stroke Yamaha F115XA.
I've read that the best way to do this is to tap into the extra out-line on my Yamaha Fuel/Water Separator.
The Tohatsu fuel line that I have seems to be the same size as my Yamaha fuel line which is 3/8 of an inch.
Seems odd that a 115 HP and a 9.8 HP use the same size fuel line.
What size brass hose barb do I require to screw into the fuel/water separator?
Am I best going with a straight connector or a 90 degree?
Do I just run the same size hose off the separator and then plumb in a new fuel line with primer bulb for the Kicker?
Going this route do I require any additional valves?
I'm concerned about sucking the fuel out of my 115 which I've heard will cause issues.

Hopefully I have included all the information needed to answer my Post.
Thanks...

[rodbolt17]

I don't recommend what your going to try.
it usually does not work.
if you do it place a fuel shutoff valve on the line to the kicker.

[DerekLong]

Thanks for the reply.

Can I ask why you don't think it is a good choice?
I have been reading a number of posts at various other forms and it seems to be a popular way to run a Kicker off the primary fuel tank.

Due to the way I fish Muskies where I am drifting/casting on shoals there are times when I need to fire up my big motor while the Kicker is still active to get me out of harms way.
I thought this solution would give me the ability to run both for the times I need to.

Thanks...

[99yam40]

when either motor is running it will suck on the other motors input and may suck air if not able to close the lines off when not running.
maybe the small motor will not suck air from larger motors fuel system vent through the pumps, but I do not know much about either of the 4 strokes you have.

I do know on carbed motors that can be a problem

[DerekLong]

Thankyou gentlemen for your responses.

[Reel Kahuna]

I thought I replied to this earlier. This is exactly how I have my F150 and T8 plumbed going 4-5 yrs now without any problem.