I'm not familiar with the gas system on your ride. But many petcocks are vacuum operated, meaning that gasoline doesn't flow until the motor is running.
Mechanical petcocks have "off" "run" and "reserve". Vacuum petcocks have "on" "prime" and "reserve", and no off position.
If you have a "prime" position on your petcock, or have no "off", then you have a vacuum operated fuel system. With the motor off, turn the petcock to "prime" and wait a while to see if the fuel overflows out of the bowl. If so ya got one of three problems:
(1) the float needle and seat are worn and will not stop the gas flow when the bowl is full; or,
(2) the float is stuck and will not rise with the bowl level to close the float needle/valve.
(3) trash or deposits have accumulated at the needle/seat junction and not allowing the fuel to be shut off.
If I had to wager, my bet would be on #1, especially with an older machine. Look on the float needle for a worn ring that will actually catch your fingernail. Some experts can resurface the needle and seat, but your best bet is to buy a matching needle/seat set.
Next, and the cheapest repair option would be #3. Look for this if the needle doesn't seem to be unduly worn.
Hope this helps.
brian cincinnati wrote:
> my 78 sachs balboa has this funny little problem where
> whenever i start her up, gasoline starts leaking out, all
> over the place. it comes out from the air filter housing,
> a friend of mine who knows more about engines that i do told
> me i just need to clean my carb, that my "floater was blocked
> i guess i'll just clean the carb, but does anyone have any
> more specific suggestions? anything to look for, what to
> use, etc?
> i'm still learning, so thanks.