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HOWHIT 150CC GY6 VACUUM LINE DIAGRAM [46,063 views]
 

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HOWHIT 150cc GY6 Vacuum Line Diagram
[46,063 views - 23 comments - Rating 4/5 ****- ]
Please see attached image.

Yellow :: Rear port of airbox --> final transmission case (hose coming from rear of engine).

Red :: From side of carburettor --> intake inlet manifold.

Green :: From oil separator, top port --> valve cover (port at the front most part of the engine).

Blue :: Clear drain hose. This hose hangs and is plugged to collect oil.

There are also fuel, overfill, and drain hoses related to the fueling system. They are not included here.
This article has been downloaded 46,063 times
23 comments about this article:
Poster #1 [02/26/10] Rating 4/5 ****-
Missing carb drain lines. May cause confusion for those not familiar with the carb set up.
Poster #2 [07/17/10]
Why are they not included? Does the fuel line from the gas tank plug in directly to the bottom port near the flow bowl of the GY6 Carburetor? And there is another port located at the center of the carburetor? Is that a fuel vent port that has a hose connected to it that just hangs down? Where does that port go?
Poster #3 [08/24/10] Rating 1/5 *----
where is the gas line
Poster #4 [Travis @ BD-ORB] [02/20/11]
Poster #3: The fuel line attaches to the brass barb on the driver's side of the vehicle (left side). You'll know it when you see it, as it is the only brass barb on the carburetor.

Poster #2: The fuel line, overflow, and drain hoses are not a part of the vacuum system. We left these items out to make it easier for those looking to troubleshoot vacuum system problems.
Poster #5 [03/01/11]
Hello, I have problems with this carb as well, there is a brass barb on the carburetor that was not hooked to anything, it just sticks out, it is on the float bowl. Where is this supposed to connect to?
Poster #6 [04/01/11]
I have gas coming ooy of the carb overflow. I think,it id=s the shourt rubber hose not connected to anything and gas is overflowing out of it
Poster #7 [04/20/11]
On the red line drawing mine has a Y in it and neither end is connected any I deas.
Poster #8 [04/23/11]
poster 5 it is an overflow it usually just has a hose that hangs off to let any extra gas that got in to drip onto the ground but its not suppose to leak or you have a float problem
Poster #9 [09/13/11]
how to connect all fuel lines
Poster #10 [09/16/11]
What should i do about my vacuum lines if i dont have an airbox...
Poster #11 [09/24/11]
get an air box (w/a filter) and connect the lines to it. you dont want ANY debris getting past the intake port into the cylinder and causing havic. its the easiest way to seize the engine. then you have to pay for more than just the air box.
Poster #12 [10/17/11]
does the air intake hook on to something. when i try to start it it will not start unless i hook it up to the thing going to the motor. when i start it it will start when the air intake is hooked onto som,ething but only go 15mph and it suppost to go 60mph. why is that
i have a hammerhead 150cc go kart
Poster #13 [11/05/11]
I have a question.. there are 2 lines on the carb.. where do they go..can you give pics or illustrations please. I am including a link to a pic from bmi karts. I really need to know where the bottom hose (next to the screw) attaches to. Thanks! http://www.bmikarts.com/item/Carburetor-for-GY6-150cc-Engine-06419-5268
Poster #14 [02/21/12]
I have a question about the two adjustable screws on the drivers side of the carb. One of them is on the bottom of the fuel bowl, and the other is near the front side, closer to the intake. I assume these are air bleeds for high and low speed operation. Am I correct wit this guess, and which one controls which speed??

Thanks for any help.
Poster #15 [04/28/12]
I can't get my gy6 to run. I've cleaned the carb twice. I've put gas directly into the cylinger at the spark plug and it starts but won't stay running. I've cleaned everything from the tank to the carb but the engine just doesn't seem to be getting fuel to the cylinder. Any suggestions?
Poster #16 [05/19/12]
poster14 its got to be uel flow did you clean the petcock as well
Poster #17 [05/28/12]
#14....THERE IS A VACUUM LINE COMING FROM THE FUEL PUMP TO THE INTAKE NIPPLE. DISCONNECT THE FUEL SUPPLY FROM THE CARB AND APPLY VACUUM TO THE VACUUM LINE. IF FUEL FLOWS THROUGH THE FUEL LINE, THEN IT IS A CARB PROBLEM...FLOAT NEEDLE PERHAPS. IF FUEL DOES NOT FLOW, THEN IT IS YOUR FUEL PUMP.
Poster #18 [09/23/12]
i have a 150cc gy6 engine on a atv i gota new carb an a coil an it still wont start it turns over but wont start
Poster #19 [10/11/12]
i have a 150 hammerhead that is leaking oil out of the hose that comes out of the motor by the front of the motor. anyone know how to fix it?...
Poster #20 [02/10/13] Rating 4/5 ****-
Poster #12, did you ever get an answer to where the bottom hose hooks up to?
Poster #21 [04/01/13]
I have 2 fuel lines on the carb1 from the tanl 1 on carb if i siphon from it gas comedout but i have to plugging it in order for it to run right where does that line suppose to go
Poster #22 [09/20/13]
Little round screw driver side of carb towards front of carb not the overflow screw ...what is that screw for
Poster #23 [12/17/13]
poster#22
air/fuel mixture screw
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