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Amboyjim

2002 Suzuki Vinson 500 Stopped Running

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Having serious problems with quad it completely stopped running on me took carb off and tore apart cleaned everything put back on and it started idled but when driving it had no power at all so took carb back off and noticed their was a puddle of gas and oil in the bottom of the air filter box and also their was gas in the vacuum line HELP

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Hey @Amboyjim welcome to Quadcrazy! 
Check the diaphragm on the fuel pump. If the diaphragm is bad and gets a hole in it the fuel gets sucked into the carburetor via the vacuum line and floods the engine and winds up getting kicked back into the air box.   
 

Also when you set the air fuel screw after the carburetor rebuild did you set it properly?  

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Blown head gasket usually will not kick back fuel into the air box like that. It's usually contained to the cylinder head and very easy to hear.  
BUT a compression test definitely could not hurt! 
 

 

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Thanks for the help the diaphragm is good and still in the process of rebuilding it again waiting for new parts to come in and I havent done a compression check yet maybe I should do that after I get the carb back on 

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I cant see fuel getting in that vacuum line any other way then a bad fuel pump.  
double check your air/fuel screw as well.  

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yea theres definitely a carb issue going on.  does your quad start sputtering once it gets hot and trying to cut out on you?  just wondering because i had a yamaha warrior that was collecting gas and oil in the airbox and it would run awesome until it warmed up and then it would quit

and that bike didnt have a fuel pump- just gravity fed

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On 4/3/2020 at 6:52 AM, Frank Angerano said:

It could be a bad rectifier also once it gets warmed up.  Very possible.   

yea i didnt think about that..  i was pretty sure with my bike it was due to me rebuilding it with a used piston and rings off another atv that i rebuilt lol.  but it could be the case with your atv

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Topic title updated with issue and moved to Suzuki ATV forum  😁

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