{"product_id":"tillotson-hw33a-throttle-shutter","title":"(37) Tillotson HW-33A Throttle Shutter (Butterfly)","description":"\u003cp\u003eThe \u003cstrong\u003eTillotson HW-33A throttle shutter\u003c\/strong\u003e is the butterfly valve disc that controls airflow through the carburetor bore. The shutter rotates on the throttle shaft — fully closed at idle, fully open at wide-open throttle. The shutter's edge seal and fit determine idle quality and off-idle transition responsiveness.\u003c\/p\u003e\n\u003cp\u003eReplace if the shutter shows wear marks on the edges, is bent, or no longer seats squarely in the bore. A worn shutter allows air to bypass at idle, causing high idle and lean off-idle conditions.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 shutter disc\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA worn throttle shutter causes tuning headaches. Inspect during rebuilds. Available at CMC Karting.\u003c\/p\u003e","brand":"IAME USA","offers":[{"title":"Default Title","offer_id":47883288150237,"sku":"TI-14-A118","price":21.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0731\/6770\/0189\/files\/CMC_KA100_37_TILLOTTSON_CARBURETOR_HW33A.png?v=1778163610","url":"https:\/\/cmckarting.com\/products\/tillotson-hw33a-throttle-shutter","provider":"CMC Karting","version":"1.0","type":"link"}