Ok guys, here's another one for ya!!!

So I have these fuel shut off valves for each tank. They have a "right, "left", and "off". The guy I bought the boat told me he always just left them both in the "left" position. Does it make a difference? I thought one should read right, the other left.... but since there are two different tanks, would it matter? I am so confused

The only reason I ask is because I noticed the other day that one tank used about 1/4 of a tank more than the other.

Can any of you Sonic guys shed some light on this valve?

On my old 30 (31) they said left ,both and right.

And i always left them on both untill 1 ran out and i switched that over,,untill i got to the pump !!

Hope this helps. so maybe the OFF is both ??!!

You want to run each engine off it's own fuel tank. Port motor have switch on left, starboard motor on right tank.. THis way each tank will empty evenly assuming your motors are consuming fuel equally.... otherwise if both motors are pulling from the same tank, now your affecting the weight balance of your boat as only one will be emptying... when you go to fill, then you put the equal amount of gas into each tank.....

I'll look at mine later today, but should be port-off-star

I'll take a pic today and post it up... wait I can't post pics anymore here.

I agree that it should pull fuel equally to have good weight distribution.... that is what I am worried about.

It just seems odd that this valve has basically two inputs (right and left) and the boat has two tanks. So my thinking is that each tank has two feeds (right and left), so I am not sure if it matters where the switch goes? Or am I way over thinking this?

email me a pic

[email protected]


I have a few interesting comments on Sonic shutoff valves

Mail sent. Thanks for the help.

Just for info,,,what did u come up with ???

UPDATE ?!

This is how I run mine. I shut the fuel valves off when trailering, but I have always wondered if I'm wasting my time doing so.

I always shut the fuel valves when trailing also. I have carb motors and found it easier to start when we went to launch. Guess it didn't allow the fuel to empty the lines and back into tank... I'm not sure either if it's necessary, just a safety thing as well..