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Carb flooding fuel

  • Thread starter Thread starter Matty-j-r
  • Start date Start date
M

Matty-j-r

Guest
Hi, I've got an 80' model GS850 and one of the carbs is spilling out fuel back through the carb. It happened when I got caught in traffic on a very hot day. It still leaks even when the engine isn't turned on so I have to make sure the tap is off. Can any one help? I'm not really confident to pull down the carb without knowing where to look.
 
The fuel needle is either dirty or the O ring for the needle seat is leaking.
Do you have a manual petcock ?? that you can turn off ??
 
I had the same problem of leaking fuel into the carbs and engine when I bought my 1980 850. The solution was to replace the needle O rings.
 
Matty-j-r : My father-in-law gave me his 81 850. It burned up after leaking fuel like yours. From what I've seen the cause seems to be dirty carbs. Good luck. ikazuki
 
You either have a stuck float or bad o-rings on the float valve seats. I would suspect the o-rings if they've never been replaced.
 
Whats the address to get the o rings for the BS32 SS cv carbs on my 650 so I can send a money order? Oh yea.the price would be nice also.
 
danbouck said:
I didn't know that it had an OFF position on the petcock
It doesn't, as long as the petcock is working properly you just don't leave it on prime. Even then as long as the diaphram isn't leaking or the floats aren't screwed up you shouldn't have fuel leaking.
 
Billy Ricks said:
You either have a stuck float or bad o-rings on the float valve seats. I would suspect the o-rings if they've never been replaced.
I would bet money this is your problem. Had the same thing recently happen to me restoring a Honda Twinstar. If fuel has been sitting in that carb for years or even months it will corrode the seat on the float valve and the bowl will overflow and out the tube on the bottom of the carb.
 
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