The manual shut off looks good! The vacuum line is routed correct. It should run directly from the intact nipple to the slide diaphragm on top of the carb. Now that the carb is gravity feed, the float and needle valve has got to be working properly. You have probably , by accident, altered the float setting while cleaning. This causes fuel to constantly flow. As the fuel level rises in the bowl the float rises also to force the needle in the seat to close off the flow. The needle has a neoprene tip that is very fragile. Inspect it closely to insure there is no damage, signs of compression, any dents or nicks. inspect the seat closely for trash or deposits around the opening. Good chance while changing tank valve and lines ,some trash go down into the carb. Invert the carb, remove the bowl and hold up to eye level. check to see the float pivots freely with no hang ups. DO NOT push down on the float! The needle has to rest naturally in the seat! Pushing will dent the tip and alter the float position. Insure the float rests level with the bowl mounting edge of the carb. Adjust with some needle nose pliers, being careful to not put pressure on the needle tip. the needle is attached to the float with a small wire clip . this clip is hung on a tab. This tab is bent to get correct float position. There are pictured tutorials on the web detailing this procedure.
sometimes it is more advantages to simply replace the carb. They are cheap and plentiful on e-bay. Make sure you save the main and pilot jets from the old carb to install in the replacement if you go this route.
Normaly when the float and needle stick there is raw fuel dumped into the cylinder. check the oil for fuel contaimination. Change the oil and replace the plug.
|