gas overflow at carb - causes? - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
 
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Old 02-12-2012, 03:17 PM Thread Starter
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gas overflow at carb - causes?

The short version: I took my carb apart and cleaned it (2004 Volusia), overall it was surprisingly clean. Now when I start the bike, it almost immediately starts gushing gas out of the overflow tube. What probs might cause this?

Pulled the carb out and it doesn't seem like the needle is sticking. Put it back on and within 10 seconds of starting, it's overflowing gas again.

Bike is stock - 7500 miles. Last time out, it was almost on empty and started running like crap and backfiring. Gassed up and barely made it home, which is why I took the carb apart. Cleaned the tank out and cleaned the carb but little or no debris and no gunk (I only run non-ethanol gas). Inside of carb looks new.

Any thoughts as to causes? I can take it apart again but not sure what I would look for differently. The float, jets, needle, etc. all looked pretty clean.

Thanks.

04 Silver & White
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Old 02-12-2012, 03:51 PM
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sounds like the needle isn't going in the seat. If the float adjustment is off it won't allow the needle to stop the flow of fuel.
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Old 02-12-2012, 05:32 PM
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Could be a stuck float. try tapping on the bowls

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Old 02-12-2012, 05:51 PM
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Quote:
Originally Posted by bluesbiker View Post
The short version: I took my carb apart and cleaned it (2004 Volusia), overall it was surprisingly clean. Now when I start the bike, it almost immediately starts gushing gas out of the overflow tube. What probs might cause this?

Pulled the carb out and it doesn't seem like the needle is sticking. Put it back on and within 10 seconds of starting, it's overflowing gas again.

Bike is stock - 7500 miles. Last time out, it was almost on empty and started running like crap and backfiring. Gassed up and barely made it home, which is why I took the carb apart. Cleaned the tank out and cleaned the carb but little or no debris and no gunk (I only run non-ethanol gas). Inside of carb looks new.

Any thoughts as to causes? I can take it apart again but not sure what I would look for differently. The float, jets, needle, etc. all looked pretty clean.

Thanks.
But did you use compressed air to blow out the fuel and air passages?

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Old 02-12-2012, 06:10 PM
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Stuck float, or you the needle valve on the float isn't where it belongs. If the carb was okay, and you took it apart to clean it, there is no reason to assume that you would have made any adjustment to the float, (either intentional or not) so it just about has to be sticking, or there is a piece of crap in the needle and seat area keeping it from seating like it should.

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Old 02-13-2012, 09:45 AM Thread Starter
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Thanks for the input. I already have the carb pulled so guess I will clean it one more time. Carefully. I did use air last time but doesn't mean I didn't miss something.

Couple of questions. I did NOT remove the funnel last time. The screws are frickin tight and I was worried about stripping them. I did spray carb cleaner through the pilot air jets as best I could. How critical is it to remove them?

Any way of telling if the float is operating properly before putting the carb back on the bike? And once I have assembled the carb, will rotating it possibly get the float stuck? Maybe by rotating it, I jarred the needle valve out of position? Dunno, just random thoughts.

I will be going though it with a finer tooth comb. Thanks again!

04 Silver & White
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Old 02-18-2012, 03:30 PM Thread Starter
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I know that I like to hear a final word on a problem so thought I would update this thread with my fix.

Causes of fuel overflow? You guys forgot to mention dumba$$. Was fumbling with the pin on the float so many times that when I finally got it in place, I failed to check the needle valve. It wasn't even seated properly! The good news was that once I spotted it, it was pretty obvious what the problem was.

Thanks for getting me pointed in the right direction!

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