gas line diameter matter?

[fishinAK1]

So before I change my fuel pump I wanna replace the gas line. The current line is 1/4 inch. I cant find a connecter fitting w/ a 1/4 barb...somhow I cant get the 5/16 to fit either. So I was thinking about changing all my gas line to 3/8 inch. This way all the lines to my kicker and main engine are all the same (less extra to carry). Anything wrong with switch a gas line to a 9.9 merc from 1/4 to 3/8 inch?
Thanks!!

 

[Maxz695]

Re: gas line diameter matter?

If the carb line from carb the fuel filter and fuel pump are 1/4 then it should n,t be a problem. If they are 3/8 inch then you risk losing pressure suplied to those areas due to restriction. you can go from bigger to smaller not smaller to bigger thats all

 

[fishinAK1]

Re: gas line diameter matter?

I dont understand. If the pump and carb lines are 1/4 and the "supply" line is 3/8, there should be more than enough fuel available right?

 

[Laddies]

Re: gas line diameter matter?

Yes, it will work fine. you were the recipient of one of the many stupid answers that float around this site recently.

 

[fishinAK1]

Re: gas line diameter matter?

Thanks Laddies.
Is that that that the concensus? 3/8 ok? Thanks to all!

 

[j_martin]

Re: gas line diameter matter?

If the carb line from carb the fuel filter and fuel pump are 3/8 then it should n,t be a problem. If they are 1/4 inch then you risk losing pressure suplied to those areas due to restriction

:facepalm:

Oversized fuel line is never a problem.

 

[Maxz695]

Re: gas line diameter matter?

Ok but when your engine starts running like it,s starving for fuel you,ll at least know why

 

[Laddies]

Re: gas line diameter matter?

Many things are repairable, but you can't fix stupid.

 

[j_martin]

Re: gas line diameter matter?

Many things are repairable, but you can't fix stupid.

Careful, you'll get the thread closed. :facepalm:

 

[Art Bernard]

Re: gas line diameter matter?

While refurbishing my fuel system on my new/used boat i replaced everything from tank to engine, including installing cutout valves with 3/8 and no problems what-so-ever. Go for it.

Art

 

[RogersJetboat454]

Re: gas line diameter matter?

Ok but when your engine starts running like it,s starving for fuel you,ll at least know why

1/4 inch socket is on the left, 3/8 inch socket is on the right....View attachment 94596

Which ones bigger?

How does a 3/8ths fuel line which is larger than a 1/4 inch fuel line cause a restriction?

My BBC on my Jet boat must really be restricted with all the 3/8ths fuel line I used.

 

[bullet 101]

Re: gas line diameter matter?

If the carb line from carb the fuel filter and fuel pump are 1/4 then it should n,t be a problem. If they are 3/8 inch then you risk losing pressure suplied to those areas due to restriction. you can go from bigger to smaller not smaller to bigger thats all

Unbelievable

 

[Gomer50]

Re: gas line diameter matter?

Number 1 flip the sockets around so you can see the difference between a 3/8 inch drive socket and a 1/4 inch drive socket. You know I have asked some really dumb/stupid questions from time to time,because at the time when dittling around it didnt seem that dumb/stupid.

 

[paultjohnson]

Re: gas line diameter matter?

Hostile crowd this mornin' somebody needs coffee or sumtn"

 

[wifisher]

Re: gas line diameter matter?

Number 1 flip the sockets around so you can see the difference between a 3/8 inch drive socket and a 1/4 inch drive socket. You know I have asked some really dumb/stupid questions from time to time,because at the time when dittling around it didnt seem that dumb/stupid.

They both look like 1/4" drive to me.

Fuel systems, and basically any other hydraulic system, or wire size, as a general rule of thumb: Bigger is OK, but smaller may cause problems.

 

[Laddies]

Re: gas line diameter matter?

I don't think there is a stupid question but take a look at some of the answers given to them.

 

[RogersJetboat454]

Re: gas line diameter matter?

Number 1 flip the sockets around so you can see the difference between a 3/8 inch drive socket and a 1/4 inch drive socket. You know I have asked some really dumb/stupid questions from time to time,because at the time when dittling around it didnt seem that dumb/stupid.

Both sockets were 1/4 drive.....

The picture was taken of the socket opening to illustrate the difference between 1/4 inch and 3/8 inch as in relation to the size of a bolt head.

 

[fishinAK1]

Re: gas line diameter matter?

whoa sorry for all the growling this caused. Thanks for the advice tho. switched out the fuel line, primer bulb, and fittings. Trolled all weekend and the kicker ran flawless. GREAT! saved having to rebuld a fuel pump!

 

[Maxz695]

Re: gas line diameter matter?

Forget these morons get help from these LOSERS

 

[Maxz695]

Re: gas line diameter matter?

Thats what I said you can go from bigger to smaller not smaller to bigger thats all