HuaSheng 4 stroke fuel lines

chuck216

Member
Joined
Mar 1, 2008
Messages
30
Hi all,

Here's my first problem while building My bike. The kit I bought comes with the HuaSheng 49cc 4 stroke, which has 3 "nipples" for lack of a better term for feul lines, upon a search of this site I do know the upper bent one is the fuel intake, the lower one on the same side, right side of motor is a fuel vent/return and the one on the carb bowl is an overflow of some kind. What I would like to know is does anyone know the proper way to run each to minimize loss of fuel through it simply overflowing.. like routing it back through a 3 way fuel filter etc. What is the best way? I'm worried about dripping fuel out on the ground.

Chuck
 


G

gone_fishin

Guest
my "similar" engine

i haven't torn into the carburetor yet...the first time i see more than the occasional drop, i'm goin' in...
Mvc-101f.jpg

i'm not sure of the question...is it dripping now? or are you simply expressing concerns over saving even the tiniest bit of fuel? 2 solutions to that, imo.


1-switch to a diaphragm carburetor, which uses an active & sealed bypass/overflow as part of the vacuum process. ideally, it's a zero-loss system.

2-attach a small "catch" can & run both vents/overflow lines into it...don't seal it as there's no pressure behind any normally dripping fuel (if any)...i think if you do this you'll see over time that's there not much lost fuel to be worrying about.

was this any help?

corrections or more info?
 

chuck216

Member
Joined
Mar 1, 2008
Messages
30
i haven't torn into the carburetor yet...the first time i see more than the occasional drop, i'm goin' in...
View attachment 4806

i'm not sure of the question...is it dripping now? or are you simply expressing concerns over saving even the tiniest bit of fuel? 2 solutions to that, imo.


1-switch to a diaphragm carburetor, which uses an active & sealed bypass/overflow as part of the vacuum process.

2-attach a small "catch" can & run both vents/overflow lines into it...don't seal it as there's no pressure behind any normally dripping fuel (if any)...i think if you do this you'll see over time that's there not much lost fuel to be worrying about.

was this any help?

It's dripping and quite a bit every time I have the petcock open. even while the motor is running
 

chuck216

Member
Joined
Mar 1, 2008
Messages
30
The one on the bowl, and also the bowl itself seems to be dripping.. but that can't be right
 
G

gone_fishin

Guest
let's start here
Mvc-104f.jpg

ps-good subject-line, it has the detail needed for future searchability
 

Andrew735

Member
Joined
Feb 19, 2008
Messages
51
Im working on my first build with this same type of engine and i wasnt sure on this so correct me if im wrong, but the two clear tubes (like in augi's picture) dont actually connect to anything besides the knobs that they are already attached to and the stright knob under the bend knob is where you attach the fuel line from the gas tank?
 
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