Fuel Flow Problem (in carb)

Farfignugin · Post by **Farfignugin** » Tue May 09, 2006 5:04 pm

The Problem: Fuel flows at idle; no vacume at high rev; petcock, filter, strainer, vacume line all fine.

Possible causes: something wrong with float? (if so what?)

Btw, this is an update to the "Interesting problem with trottle" topic.

Any help again would be much appreciated.

Thanks in advance.

Farfignugin · Post by **Farfignugin** » Tue May 09, 2006 9:57 pm

Update: float is fine, along w/ reed valves, what could be wrong????

hondaman · Post by **hondaman** » Wed May 10, 2006 12:19 am

Possible small obstruction in gas line? Try putting a new line on.

Farfignugin · Post by **Farfignugin** » Wed May 10, 2006 7:20 am

gas flow is fine, but when I checked the vacuume when the scooter is running, its ok at idle, but when I throttle up there is no vacuume. What could cause this?

stankyoleman · Post by **stankyoleman** » Wed May 10, 2006 7:27 am

maybe a vacuum leak somwhere in the carb.... maybe when you're throttling up, the vacuum becomes greater, draws more gas and the leak gets worse and voila no vacuum. check to see and make sure that you have a rubber gasket attatched to the upper part of carb on the seam that seals off both halves.

mopedman · Post by **mopedman** » Wed May 10, 2006 8:19 am

yea that would explan it

Farfignugin · Post by **Farfignugin** » Wed May 10, 2006 9:13 am

yes there is a gasket

mopedman · Post by **mopedman** » Wed May 10, 2006 9:46 am

this is a tuff problem....hmmmm.... i dk

Farfignugin · Post by **Farfignugin** » Wed May 10, 2006 11:52 am

i don't know either, the only thing i do know is what is wrong, not why, or how to fix it.

hondaman · Post by **hondaman** » Wed May 10, 2006 12:57 pm

Are you sure your vaccuum line does not have a small hole or split in it?

mopedman · Post by **mopedman** » Wed May 10, 2006 2:03 pm

yea cuz that would realy explane it

Farfignugin · Post by **Farfignugin** » Wed May 10, 2006 3:23 pm

yes, tested with a vaccume pump and it held vaccume.

Farfignugin · Post by **Farfignugin** » Wed May 10, 2006 4:28 pm

Update: replaced all lines (fuel, oil, vaccume); Problem remains, not something to do with vaccume, but rather the float (might be sticking) cause fuel flows fine with vaccume, but doesnt flow when running.

Anyone know a reliable online place to buy a carb rebuild kit?

Post by **noiseguy** » Wed May 10, 2006 5:18 pm

If the gaskets are fine, how's compression?

Also wondering if your petcock is getting old and sticky, so that it doesn't open on throttle. Vacuum should dip, but not disappear, on throttle.

Farfignugin · Post by **Farfignugin** » Wed May 10, 2006 7:50 pm

compression is fine, maybe i should check the petcock...