Working on a Cub cadet src-621 push mower with the kawasaki FJ180V 4 cycle engine. The needle and seat leaks (very slow) after an overnight sit. The next day you cannot turn the engine over (hydro lock) without removing the spark plug first. I installed a shut off valve and on each shutdown, I allow the engine to run maybe 30 seconds after closing the valve to burn some remaining fuel in the float bowl and everything is ok on the next day start. I removed the carburetor and try to blow into the fuel inlet with the carb upside down (to allow the float to push the seat closed) and it appears to allow air to bleed past. So I tear down the carb and find a little "ring" of wear on the needle jet. I had to get out the magnifing glass to see it. To my surprise, Partstree and others tell me it is 17 bucks for a needle. Sheesh. There has to be another alternative or a cheaper part. It has a Walbro carburetor made in Japan. Says "LMJ" on the side of it. The part number is km-16009-2136. Can anybody help me out here? I really don't like to have that valve on there as a fix. Not very professional. Thanks in advance.