Left carb leaking (but not through overflow)

[Mast372MIND]

Hey guys,

 

I'm having a problem with my left carb leaking gas. It seems to be a very slow leak, so its not a problem when riding, but when I put it up for a few days there is an oily residue that forms around the bowl. Its only happening on the left side carb. I put a piece of paper under it and it only dripped once overnight, so its not that bad. However, i would like to get it fixed just to avoid pooling gas around the bottem end cases. After I looked at it this morning, I think there was a little reside above the bowl flange, so I dont know if its coming from the bowl or maybe a leak around the fuel line. Anyone else ever have this problem???

 

Thanks!

 

-Rob

[firebanshee]

Are you shutting your fuel off when it is sitting?

[Mast372MIND]

Are you shutting your fuel off when it is sitting?

 

Yeah, I shut off the fuel anytime she's not running.

[bansheesandrider]

Is your float level set properly? Do you have a good float needle and seat? The needle should have a smooth and flat taper wth no rings or bumps on it, the O ring on the outside of the seat should not be hard or cracked. The seat should not just fall out of the carb when you turn it over, when installing the seat in the carb it should be a snug fit so it does not leak around the outside of the seat between it and the carb. If all of this is correct, then recheck your gasket and carb for inperfection, do not use any type of sealant on these gaskets as it will make jet changes and cleaning difficult.

[Mast372MIND]

Is your float level set properly? Do you have a good float needle and seat? The needle should have a smooth and flat taper wth no rings or bumps on it, the O ring on the outside of the seat should not be hard or cracked. The seat should not just fall out of the carb when you turn it over, when installing the seat in the carb it should be a snug fit so it does not leak around the outside of the seat between it and the carb. If all of this is correct, then recheck your gasket and carb for inperfection, do not use any type of sealant on these gaskets as it will make jet changes and cleaning difficult.

 

Thanks for the reply. I think I'll tear it down again after the weather warms back up in OK. I will pay attention to the things you mentioned when I go back through it and update the post with what I find out. If anyone else has anything else to add in the meantime, please do so.

 

Thanks,

Rob

[Larry's Shee]

How long has it been going on? Outside possibility of a pourous casting.

[Mast372MIND]

How long has it been going on? Outside possibility of a pourous casting.

 

I've only had the quad since November, but I think its been happening since I got it. I only say that because the carbs were very dirty around the bowls, suggesting that there was fuel/oil mix leaking slowly out and collecting dirt. Like I said, the leak is very slow (it doesn't drip or anything unless it is allowed to sit overnight or longer, even then only a few drops). I also noticed that if I let it idle for about 1 min with the fuel off before putting it up, it doesn't leak (obviously due to a lower bowl liquid level).