Dear GearNut
Everything in my carb bowl seems o.k. Accidentally left the pet cock open last night and found a puddle on gas on the floor . So tank must be venting but that says the float must have stuck. The doughnut is empty and does float!! The needle valve moves easily without restriction . Should I maybe lube the jet stem and wall of the bowl??? Seems like the prob started when I cut my fuel to oil mix to 20:1. Instead of the 16:1 breaking in ratio. Not sure about it but think prob started after cutting it back! If lubing the jet stem and inside bowl sounds like an idea what should I use?? Vaseline ???
Thanks for any INPUT!!!!
Ron J
Road America's Rockin Ronny
P.S. only have about 2-300 miles on the bike.
Sent from my iPad
On Aug 6, 2012, at 23:23, "Motorized Bicycle: Engine Kit Forum" <
[email protected]> wrote:
Dear Ron j,
GearNut has just replied to a thread you have subscribed to entitled - fuel pick up prob - in the Motorized Bicycle Trouble Shooting forum of Motorized Bicycle: Engine Kit Forum.
This thread is located at:
http://motorbicycling.com/showthread.php?t=41432&goto=newpost
Here is the message that has just been posted:
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An intermittently venting cap is a bizarre problem.
There are no moving parts on them. They vent through the center portion, the cup that holds the spring in place, and through a passage (sometimes many passages) created by a ribbed crimp where the pretty chrome top attaches to the underbody of the cap.
Some folks drill a teensy, tiny, itty bitty hole off center through the pretty shiny chrome top th insure that the cap will vent. This can lead to fuel weeping out of the hole as it shakes and vibrates inside the fuel tank while you are riding down the road. Just be aware of this possible side effect.
As for the float getting hung up in the open or closed position, the Brass fork that the float pushes against must be able top freely pivot on the small pin that holds it in place on the carburetor body. Check this area for anything that might cause an issue, and carefully correct it. Also the float needle, the pointy thing that the float fork operates, which is the actual fuel valve inside the carburetor, must be able to freely move inside the needle seat up inside the carburetor body.
A note for assembly: the pointy black rubber tip of the float needle goes up into the needle seat. The other metal end is what the float fork presses against.
While the following has no effect on fuel starvation it is still worthy of checking:
Check the float itself to be sure that it does not have any fuel inside of it. If it has a leak and is filling up with fuel, this will cause the float to turn into a no-float and the carburetor will flood all the time.
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All the best,
Motorized Bicycle: Engine Kit Forum
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