1996 Yamaha Kodiak 400 Leaking Fuel New Carb

[Hunter76]

I bought a new carb and it is leaking gas from the over flow tube. What causes it. It's a brand new carb.

[MarkinAR]

Float valve not sealing properly in the float seat.  Is it a chinese clone?  Those usually have hard rubber and can cause all kinds of issues.

Try taking the float valve out and polishing the seat with a q-tip in a drill and a touch of carb cleaner and hopefully it'll seal.

[Mech]

Yeah could be a leaking float needle valve, or the float level might be set too high, or there might be a leak between the float needle valve's brass housing/seat and the carby body.

Take the carby apart and pull the float out, then the needle and then the needle's seat. Check the "O" ring or washer that seals between the seat and carby body, then put that in and check the needle's clean and put that in, then fit the float and check it's height adjustment.

[BUKNDUK]

About 4 years ago I bought a Chinese made carburetor for a spare just in case I needed it. This last Duck season my 2004 Yamaha Bruin 350 4x4 started running terrible it would not idle it would die so I decided to try the new Chinese carb I had. While I was removing original carburetor I noticed one rubber tube connected to the carb was cracked over half way so I proceeded to remove and install new Chinese carb. After the installation of the Chinese carb I started smelling gas so I found gas leaking from new carburetor so I figured I would install the original carburetor because I replaced cracked rubber hose. After installing it ran great it idled perfect. 
then I started smelling gas again it was leaking from the overflow tube at bottom of carburetor. So I ordered a new oem carburetor from Partzilla. 
received new oem carb installed it runs great and no gas leak 

[Busman]

I had the same issue I I disconnected the carburetor except for the throttle cable flipped it upside down remove the bowl used carburetor cleaner in copper wire cleaned all the Jets in the overflow tube put it all back together and it ran great and stoped leaking gas ! 

[Dennis Martin]

Over the years I've found that buying genuine engine parts more than pays for frustration of the clones.

[BUKNDUK]

I learned my lesson I will never buy a Chinese Carburetor again oem is the only way to go 

[Dennis Martin]

4 hours ago, BUKNDUK said:

I learned my lesson I will never buy a Chinese Carburetor again oem is the only way to go 

Governor springs are even worse.  Generators need the proper rpm to operate.  Mix and match governor parts are a disaster.