engine starving for fule

[tlr426]

So I hooked up my 200 hp yamaha ox66 and my T8 yamaha to the same fule tank. I ran the fule line into a water sep fule filtter then into individual primer balls then to the motors. I took it out for a small run the other day, ran the kicker for a bit then ran in. All was well then today I went fishing and ran the kicker for 6hrs ran great. Fired the main it ran well up on plane then started to sputter I backed it off and the ball was soft but it was runing smooth. So back to speed and the same thing started to sputter.... Any ideas what's up any help would be great.

[TileMan Dan]

Could be fuel pump not pumping enough at higher rpms Go cheapest rout first and change out fuel filters hopefully problem lies there

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[bigblue]

You may be drawing air through the kicker line pinch it off with vise grips if the problem goes away install 3 way valve in the line to seperate the motors.

Edited May 9, 2014 by bigblue

[lineman49]

   Check for lines sucking air, ck. filters, ck  for water in tank. jmo.  Ask/PM  L&M guru knows all!

[Reelguy]

Had this happen to me, replace the primer ball.

[Has Been]

Replace the primer ball & speaking from experience , buy a good one .Check all fittings& tank connections also.  All you need is a tiny cut in one of the O rings on the Quick connects , or loose hose clamp.

[tlr426]

Thanks everyone I am going down on sunday to do some more investigation. I will look into all suggestions hopefully successfully!

[L&M]

You may be drawing air through the kicker line pinch it off with vise grips if the problem goes away install 3 way valve in the line to seperate the motors.

That would be where I would start.

[tlr426]

Checked all the fittings and clamped off the kicker line. Motor ran like a stud thanks everyone looks like an easy fix

[jimski2]

A tee for fueling your kicker will allow air to be sucked in from the other engines fuel hose where it connects to the engine. Best to run your kicker on another tank.

[tlr426]

What about anti siphoning check valves at the water sep filtter?

[lakebound88]

Did you put a one way check valve after water separator? That will cause this too as you can suck air as mentioned above.. also, disconnecting your kicker fuel supply and letting the ball seat is am easy check versus pinching line..

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[RSF]

Ditto bigblues thought.