Fuel Breather Line Leaky Fuel

[DoYouSki]

When i fill tank full, while transporting boat with trailer, fuel spills out thru breather line on side of hull. very frustrating. All over trailer wheel well.

Can i remove Breather line?

 

1983 Malibu Skier V8. Indmar, velvet tranny

Carb- 4 barrel 650cfm edelbrock

No electric pump

Just regular fuel pump attached to block.

Edited September 11, 2022 by DoYouSki

[csleaver]

Fuel needs room for expansion and the tank needs to be able to vent to relieve that pressure and to also allow atmosphere to enter the tank as fuel is used by the engine.  You may be overfilling the fuel tank.

[UWSkier]

You can install a Racor air/fuel separator on the vent line to prevent the spilling/overflow from the vent line.

[DoYouSki]

37 minutes ago, UWSkier said:

You can install a Racor air/fuel separator on the vent line to prevent the spilling/overflow from the vent line.

Thx

[DoYouSki]

1 hour ago, csleaver said:

Fuel needs room for expansion and the tank needs to be able to vent to relieve that pressure and to also allow atmosphere to enter the tank as fuel is used by the engine.  You may be overfilling the fuel tank.

 

1 hour ago, csleaver said:

Fuel needs room for expansion and the tank needs to be able to vent to relieve that pressure and to also allow atmosphere to enter the tank as fuel is used by the engine.  You may be overfilling the fuel tank.

I guess will fill to 3/4 only.

 

Thx

[granddaddy55]

4 hours ago, DoYouSki said:

When i fill tank full, while transporting boat with trailer, fuel spills out thru breather line on side of hull. very frustrating. All over trailer wheel well.

Can i remove Breather line?

 

1983 Malibu Skier V8. Indmar, velvet tranny

Carb- 4 barrel 650cfm edelbrock

No electric pump

Just regular fuel pump attached to block.

the method to fixing this in the old days was a pourous stone put into vent at vent line, cant remember what its called 

[Woodski]

Make sure the vent line incorporates a loop.  That keeps the fuel from spilling.

[solorex]

2 hours ago, Woodski said:

Make sure the vent line incorporates a loop.  That keeps the fuel from spilling.

Exactly this.  I just redid my lines (cause they were old and getting crusty).  Make a loop with zap straps and you won't have issues.  The air/fuel separator is nice, but this is a cheaper alternative.  I don't ever have spill issues.

[DoYouSki]

4 hours ago, Woodski said:

Make sure the vent line incorporates a loop.  That keeps the fuel from spilling.

Thx,

wont fuel get trapped in loop,  keeping air from entering??

[Woodski]

It can.  Since one end is still open to atmosphere it allows for expansion & contraction.  Vent line should be 5/8” diameter.

[DoYouSki]

20 hours ago, DoYouSki said:

Thx,

wont fuel get trapped in loop,  keeping air from entering??

Thx,sounds good

 

Next question, is loop above breather line? To keep fuel in, or loop below breather line? .

 

Thx

[Woodski]

Either way actually works, since breather comes off top of tank there is very little room to loop above so a down loop then up to the vent will work.  That is the way it would have been done when built.  An above loop would be ideal.

[DoYouSki]

On 9/14/2022 at 5:59 AM, Woodski said:

Either way actually works, since breather comes off top of tank there is very little room to loop above so a down loop then up to the vent will work.  That is the way it would have been done when built.  An above loop would be ideal.

Nice, i will do this, this winter, something to do, thank you very much