<VV> YH Carb

[Bryan Blackwell]

I did once have trouble with an H not getting fuel, it turned out the float arm was rubbing on the bowl.  That could be your trouble as well, maybe something is catching when the carb is together that works fine when it's apart.

If not, maybe you could troubleshoot further by taking the carb apart and use an electric pump to supply fuel while opening and closing the needle valve.  I'd have to look at a YH to see if this test is possible, but that's what I'd do on an H.

--Bryan

On May 3, 2011, at 4:24 PM, Smitty wrote:

> I have changed four needle and seat sets.  I have checked the casting under the seat for cracks and smoothness where the seat gasket sits.  I have checked the float for fuel inside.  I have checked the float drop and reset the float level clear down to 3/4 inch.  Also reshaped the float hinge assy to insure the float is horrizontal at the float level position.
> When the engine is running fuel starts appearing around the large tube going to the concentric venturi.  It incresase until it is literally pouring out the drain hose.  After the engine is off it continues to pour for 10-15 seconds and then tapers off.  Just exactly as though the float needle were leaking.