FUEL LINE
Moderators: BeaconMarineBob, Moderator, BeaconMarineDon
-
- Moderate User
- Posts: 743
- Joined: Fri Jul 17, 2009 4:01 pm
- Location: Mt Juliet, TN. Percy Prist Lake, Fate Sanders Marina
FUEL LINE
Hi all,
Got to make this fast, gotta go VA hosp for tests. But I'd like to hear your views on the fuel. Right now mine is stiff copper tubing. I have had no problem's, but it makes me nervous, fearing a crack, then leak.
I was thinking about changing it to a flexible fuel line?
What are your thoughts on this?
Thanks,
Larry
Got to make this fast, gotta go VA hosp for tests. But I'd like to hear your views on the fuel. Right now mine is stiff copper tubing. I have had no problem's, but it makes me nervous, fearing a crack, then leak.
I was thinking about changing it to a flexible fuel line?
What are your thoughts on this?
Thanks,
Larry
leave it alone....
TIKI III
1985 F32
270 Crusaders
Wet and happy
http://photos-g.ak.fbcdn.net/hphotos-ak ... 9727_n.jpg
1985 F32
270 Crusaders
Wet and happy
http://photos-g.ak.fbcdn.net/hphotos-ak ... 9727_n.jpg
- ready123
- Ultimate User
- Posts: 1841
- Joined: Sat Nov 08, 2008 5:53 pm
- Location: Mactier, Ontario Canada
- Contact:
Don't worry...Copper actually remains quite flexible over time and does not become brittle with age/sunlight etc:
Stop thinking Larry get out on the water and enjoy.
Stop thinking Larry get out on the water and enjoy.

Michael
Rum is the reason Pirate's have never ruled the world
Done Dreamin'
1987 President 43' Twin Lehman 225SP Turbo
Highfield 310 Ally 15 HP Yamaha 2cycle
1978 F32 Sedan twin 318 Chry SOLD
Safe Cove Marina, Port Charlotte, FL
Rum is the reason Pirate's have never ruled the world
Done Dreamin'
1987 President 43' Twin Lehman 225SP Turbo
Highfield 310 Ally 15 HP Yamaha 2cycle
1978 F32 Sedan twin 318 Chry SOLD
Safe Cove Marina, Port Charlotte, FL
Hi Larry,
The only place you should have flexible line on your fuel system is a short peice at the fuel pump. This allows the engine to move without pulling on the copper.
If you don't like the way your copper line looks (dents, niks, etc) you could alwayse replace it with a new copper line.
The only place you should have flexible line on your fuel system is a short peice at the fuel pump. This allows the engine to move without pulling on the copper.
If you don't like the way your copper line looks (dents, niks, etc) you could alwayse replace it with a new copper line.
Paul
"Cruise Control" 1978 F-26HT
"No Control" 2012 9' Grand RIB
"Cruise Control" 1978 F-26HT
"No Control" 2012 9' Grand RIB
- ready123
- Ultimate User
- Posts: 1841
- Joined: Sat Nov 08, 2008 5:53 pm
- Location: Mactier, Ontario Canada
- Contact:
Why shout??duchess wrote:TRY THINKING ABOUT THE ANTI SIPHON CHECK VALVES BACK AT THE FUEL TANK,
His boat has not shown any symptoms that need him to do this.....
Michael
Rum is the reason Pirate's have never ruled the world
Done Dreamin'
1987 President 43' Twin Lehman 225SP Turbo
Highfield 310 Ally 15 HP Yamaha 2cycle
1978 F32 Sedan twin 318 Chry SOLD
Safe Cove Marina, Port Charlotte, FL
Rum is the reason Pirate's have never ruled the world
Done Dreamin'
1987 President 43' Twin Lehman 225SP Turbo
Highfield 310 Ally 15 HP Yamaha 2cycle
1978 F32 Sedan twin 318 Chry SOLD
Safe Cove Marina, Port Charlotte, FL
-
- Moderate User
- Posts: 743
- Joined: Fri Jul 17, 2009 4:01 pm
- Location: Mt Juliet, TN. Percy Prist Lake, Fate Sanders Marina
OK, you got me curious about the "THE ANTI SIPHON CHECK VALVES "
What is it, what does it look like and what my be the symptoms?
On my F25 the gas tank is right under and in between the hatches for the rudder controls and the engine compartment hatch, making it hard to see things about it or repair anything.
I did buy a 6" Inspection hatch to put right over the sending unit so it would be easier to install another sending unit, if needed.
Thanks you, Larry
What is it, what does it look like and what my be the symptoms?
On my F25 the gas tank is right under and in between the hatches for the rudder controls and the engine compartment hatch, making it hard to see things about it or repair anything.
I did buy a 6" Inspection hatch to put right over the sending unit so it would be easier to install another sending unit, if needed.
Thanks you, Larry
- Stripermann2
- Ultimate User
- Posts: 3027
- Joined: Fri Jan 19, 2007 9:11 am
- Location: Solomon's Island, MD
Here is what the Anti syphon valve looks like. It's where the fuel line meets the tank. This valve is threaded into the tank fitting and the line attaches to this valve.
The device has a valve and spring inside. When you have fuel pressure, (sucking fuel) the valve overcomes the spring tension and allows fuel to flow. When there is no fuel pressure, the spring forces the valve against it's seat, shutting off fuel. The reason it's there, is in case you were to rupture a fuel line, there would be not be enough pressure sucking via fuel pump to overcome the spring tension, thereby shutting off fuel. No fuel to spray over hot engine components, etc...
The valve and spring get gummed up over time and a simple cleaning is usually all it takes to get fuel flowing again.
BTW: I just replaced one engine's copper line. I went to the hardware store and purchased 3' of propane copper line, this withstands high pressure and is flexible to bend to fit by hand. I double flared the ends.

The device has a valve and spring inside. When you have fuel pressure, (sucking fuel) the valve overcomes the spring tension and allows fuel to flow. When there is no fuel pressure, the spring forces the valve against it's seat, shutting off fuel. The reason it's there, is in case you were to rupture a fuel line, there would be not be enough pressure sucking via fuel pump to overcome the spring tension, thereby shutting off fuel. No fuel to spray over hot engine components, etc...
The valve and spring get gummed up over time and a simple cleaning is usually all it takes to get fuel flowing again.
BTW: I just replaced one engine's copper line. I went to the hardware store and purchased 3' of propane copper line, this withstands high pressure and is flexible to bend to fit by hand. I double flared the ends.

Jamie
1985 F-32 270 Crusaders
1988 Sea Ray 23 350 Merc.
Trojan. Enjoy the ride...
-I don't wanna hear anyone whine...Anymore!
-You might get there before me, but you still have to wait for me, for the fun to start!
1985 F-32 270 Crusaders
1988 Sea Ray 23 350 Merc.
Trojan. Enjoy the ride...
-I don't wanna hear anyone whine...Anymore!
-You might get there before me, but you still have to wait for me, for the fun to start!