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PostPosted: Tue Aug 13, 2019 1:41 pm 
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Tadpole

Joined: Wed Sep 27, 2017 3:57 pm
Posts: 2
I RECENTLY FILLED BOTH FUEL TANKS AND HAVE THE FUEL VALVES SET TO THE ON POSITION FOR EACH TANK AND THE MAIN LINE. IN THIS SETUP THE MANUAL STATES THAT BOTH PORT AND SB ENGINES ARE DRAWING FROM BOTH FUEL TANKS. AFTER TRAVELING ABOUT 45 MILES I NOTICED THAT MY FUEL GAUGES WERE DRASTICALLY DIFFERENT. i WAS ABLE TO ADD 30 GALLONS OF FUEL IN ONE TANK AND ONLY 9 GALLONS IN THE OTHER. HAS ANYONE ELSE EXPERIENCED THIS ISSUE WHERE FUEL IS PRIMARILY BEING USED BY ONE TANK? ALSO, HOW ARE OTHERS USING THE FUEL TANK VALVES - ARE YOU HAVING EACH ENGINE DRAW FROM THEIR OWN TANK?

I WOULD APPRECIATE ANY COMMENTS.

THANKS.


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PostPosted: Tue Aug 13, 2019 8:49 pm 
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email admin your custom rank

Joined: Thu Jul 13, 2006 7:45 pm
Posts: 2866
Location: Indiana
off the grid wrote:
I RECENTLY FILLED BOTH FUEL TANKS AND HAVE THE FUEL VALVES SET TO THE ON POSITION FOR EACH TANK AND THE MAIN LINE. IN THIS SETUP THE MANUAL STATES THAT BOTH PORT AND SB ENGINES ARE DRAWING FROM BOTH FUEL TANKS. AFTER TRAVELING ABOUT 45 MILES I NOTICED THAT MY FUEL GAUGES WERE DRASTICALLY DIFFERENT. i WAS ABLE TO ADD 30 GALLONS OF FUEL IN ONE TANK AND ONLY 9 GALLONS IN THE OTHER. HAS ANYONE ELSE EXPERIENCED THIS ISSUE WHERE FUEL IS PRIMARILY BEING USED BY ONE TANK? ALSO, HOW ARE OTHERS USING THE FUEL TANK VALVES - ARE YOU HAVING EACH ENGINE DRAW FROM THEIR OWN TANK?

I WOULD APPRECIATE ANY COMMENTS.

THANKS.


The center valve should be closed, forcing each engine to draw from it's own tank. Genny will draw from the port tank.

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2007 358 T-5.7GXi IB
Previous Boats
'08 H240, '08 V318, '04 268, '04 225


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PostPosted: Mon Aug 19, 2019 12:23 pm 
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Tadpole

Joined: Mon Aug 19, 2019 11:28 am
Posts: 4
Location: St Albans, VT
firecadet613 wrote:
off the grid wrote:
I RECENTLY FILLED BOTH FUEL TANKS AND HAVE THE FUEL VALVES SET TO THE ON POSITION FOR EACH TANK AND THE MAIN LINE. IN THIS SETUP THE MANUAL STATES THAT BOTH PORT AND SB ENGINES ARE DRAWING FROM BOTH FUEL TANKS. AFTER TRAVELING ABOUT 45 MILES I NOTICED THAT MY FUEL GAUGES WERE DRASTICALLY DIFFERENT. i WAS ABLE TO ADD 30 GALLONS OF FUEL IN ONE TANK AND ONLY 9 GALLONS IN THE OTHER. HAS ANYONE ELSE EXPERIENCED THIS ISSUE WHERE FUEL IS PRIMARILY BEING USED BY ONE TANK? ALSO, HOW ARE OTHERS USING THE FUEL TANK VALVES - ARE YOU HAVING EACH ENGINE DRAW FROM THEIR OWN TANK?

I WOULD APPRECIATE ANY COMMENTS.

THANKS.


The center valve should be closed, forcing each engine to draw from it's own tank. Genny will draw from the port tank.




I agree. Hey hey I got a post.........!!

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2009 Four Winns 358 Vista


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PostPosted: Fri Dec 11, 2020 9:12 pm 
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Guppy

Joined: Tue Dec 08, 2020 12:24 pm
Posts: 6
I presently have a 07 V378 with the same issue. Did you fix your issue? If so what did you do? Thanks.


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PostPosted: Sat Dec 12, 2020 8:18 am 
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Shark

Joined: Tue Oct 27, 2015 7:52 am
Posts: 139
Location: Huntsville, AL
Fuel transfer is achieved by gravity and level of the boat. If the boat is listing to the port side, more fuel will begin to transfer to the port tank since gravity will pull it in.
Recommend always keeping the transfer line closed for these reasons.

1. If fuel becomes contaminated in one tank, you can still motor home on the other.
2. List, wave action, and/or turning of the boat will cause fuel to transfer to the lower side of the boat making one tank heavier and causing a continuous transfer based on the list of the boat.

Only transfer fuel when needed and then shut the valve back off.

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2007 278 Vista
6.2L Mercruiser


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PostPosted: Sat Dec 12, 2020 8:28 am 
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email admin your custom rank

Joined: Thu Jul 13, 2006 7:45 pm
Posts: 2866
Location: Indiana
TheDanceII wrote:
Fuel transfer is achieved by gravity and level of the boat. If the boat is listing to the port side, more fuel will begin to transfer to the port tank since gravity will pull it in.
Recommend always keeping the transfer line closed for these reasons.

1. If fuel becomes contaminated in one tank, you can still motor home on the other.
2. List, wave action, and/or turning of the boat will cause fuel to transfer to the lower side of the boat making one tank heavier and causing a continuous transfer based on the list of the boat.

Only transfer fuel when needed and then shut the valve back off.


It's really a crossover valve, allowing the engines to draw fuel from either tank, not taking a transfer valve.

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2007 358 T-5.7GXi IB
Previous Boats
'08 H240, '08 V318, '04 268, '04 225


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