More advise?

J

jimsplace

Active member
KONA said:
jimsplace said:
KONA said:
check my post, 


carbed motor does not need a fuel return
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Some carbed motors may not need a regulator, whether it needs a regulator depends on the fuel pump being used.
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I agree that keeping it simple is a good idea if you can and that some fuel pumps do not need a regulator, but some pumps and regulators used for carb'd motors do require a return line.  I wouldn't want someone to buy a pump and regulator thinking that all pumps and regulators for carburetor motors do not need a return line when it might.

The Aeromotive pumps are one example that requires a return line for the most part.  They make extremely good pumps, but they require a return line.  It is just a matter of checking with the manufacture or someone who knows to be sure.
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N

NescherMonty17

New member
hell no, ive been taking a nap. lol 

my fuel pump IS a CAR fuel pump, but the fuel return has just been blocked off.

i do NOT have a return line, nor a place to hook up a return on my tank.

My vent IS 50% clogged with paint.

a fuel pressure guage sounds like a great idea, however, i dont have one, and i dont have a place to conveniently test it.

i can feel my motivation kicking in while im typing, ill try to get this done tonight and post pics as to not keep you guys waiting.

Thanks!
 
N

NescherMonty17

New member
Members of the Jury, may i present to you Exibit A, and Exibit B.    jump.gif

im pretty sure i can fix the vent with a needle and some sand paper... make it flow properly...

however the fuel pickup tube is all kinds of bent, and the little steel mesh on the end is all kinds of messed up, im actually suprized it ran at all.

im gonna buy a whole new pickup assembly at my local boat parts store for $27.00 ... it has an acrylic tube rather than a metal one.. and the fitting itself is stainless.

think.gif

so...yeah im pretty sure this is my whole issue, and ill fix it with my pay check on friday.  :smile16:

 

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spd500

spd500

New member
The screen on the vent being plugged up is not why you are having gas leaking all over the side of the boat . There has to be something else going on there , not sure if there should be a ball inside the vent housing somewhere or what . But the screen being cleaned will actually only allow more gas to leak out .
 
C

ChryslerJet

New member
spd500 said:
The screen on the vent being plugged up is not why you are having gas leaking all over the side of the boat . There has to be something else going on there , not sure if there should be a ball inside the vent housing somewhere or what . But the screen being cleaned will actually only allow more gas to leak out .
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i agree on this I would check the connection on the tank for the vent it should not go into the tank but just connect to it at the very top of the tank. If it's in the tank it could be suctoning gas out of the tank.  It also should be a rather small fitting and hose like 3/8 or 5/16 size hose.  Just some ideas.
 
Last Mohecian

Last Mohecian

Administrator
The screen on the vent being clogged up can however cause a vacuum lock in the tank and be there reason for the fuel issue after a long run.
 
N

NescherMonty17

New member
Last Mohican said:
The screen on the vent being clogged up can however cause a vacuum lock in the tank and be there reason for the fuel issue after a long run.
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Yeah this was the issue i was refering to...  but im pulling the vent out right now, so ill post a pic in a few.

The pickup being clogged and crimped causing not enough fuel to be sent to the motor.
 
N

NescherMonty17

New member
ok so it seems as there is just a tube connected to the tank from the vent with nothing in between.
 

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C

ChryslerJet

New member
NescherMonty17 said:
do i need an antisiphon valve on the pickup tube?  could i put an antisiphon valve inline between the vent and the tank?
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You don't need the antisiphon valve at all especially with a rear tank.  They are mainly there for front tanks so the fuel line keeps some of the fuel in the line and the pump doesn't have to work as hard to get the initial fuel up to it.  With those pics of the vent line cant tell on the fitting on the tank does it go into the tank as in have a tube or line inside the tank that would allow it to be sitting in the gas or is it just attached to the tank at that point?  That would be one of my concerns.  A coil in the vent line would also help prevent gas from escaping just get a longer hose and make a vertical coil kinda like a hotwheels loop de loop.
 
N

NescherMonty17

New member
ChryslerJet said:
NescherMonty17 said:
do i need an antisiphon valve on the pickup tube?  could i put an antisiphon valve inline between the vent and the tank?
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You don't need the antisiphon valve at all especially with a rear tank.  They are mainly there for front tanks so the fuel line keeps some of the fuel in the line and the pump doesn't have to work as hard to get the initial fuel up to it.  With those pics of the vent line cant tell on the fitting on the tank does it go into the tank as in have a tube or line inside the tank that would allow it to be sitting in the gas or is it just attached to the tank at that point?  That would be one of my concerns.  A coil in the vent line would also help prevent gas from escaping just get a longer hose and make a vertical coil kinda like a hotwheels loop de loop.
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My tank is in the front, and no there is nothing inside the tank on the vent side... it just connects to the top of the tank.
 
K

KONA77

New member
mine is the same,  vent hooked up the same,  i have no issues,  i just don't fill the tank to the brim  :smile16:
 
C

ChryslerJet

New member
Patchman said:
That pick up screen was the main problem! :smile30:
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I don't doubt that was the fuel starvation problem.  Still trying to figure out the vent pumping gas problem.  Kona might be on it though to not have a full tank especially not full up tot he top of the filler tube cause that would cause fuel to come right out the vent.  The only solution to that is a vented cap and block off the vent.
 
K

KONA77

New member
ChryslerJet said:
Patchman said:
That pick up screen was the main problem! :smile30:
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I don't doubt that was the fuel starvation problem.  Still trying to figure out the vent pumping gas problem.  Kona might be on it though to not have a full tank especially not full up tot he top of the filler tube cause that would cause fuel to come right out the vent.  The only solution to that is a vented cap and block off the vent.
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he most likely has a screw in/  flush mount fuel cap,  so he wouldn't want a vented cap on the deck of his boat,  not to mention the possibility of getting water in his fuel tank....

now the make a vent to replace the old style of vents,  that will not let fuel flow out,

i use to fill my tank to the very top and i would have fuel come out of the vent in a hard  left turn,  so i just stopped filling the tank to maximum capacity,  my tank is 24 gallons and i just fill to 20 or 22 gallons and no more problems
 
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