{"product_id":"tillotson-78a-256-brass-mixture-screw-washer-high-low-side-oem-carburetor-part","title":"Tillotson 78A-256 Brass Mixture Screw Washer - High\/Low Side - OEM Carburetor Part","description":"\u003cp\u003eSecuring a leak-free fuel circuit is the most critical step in any go karts supply rebuild, and the Tillotson 78A-256 Brass Mixture Screw Washer is the exact hardware required to protect your carburetor's O-rings. Designed to sit perfectly between your fuel adjustment needle spring and the O-ring, this OEM brass washer prevents the spring from tearing, crushing, or deforming the seal during high-vibration racing conditions. When you are pushing the limits on the track, a compromised fuel circuit seal can lead to disastrous lean conditions or erratic RPMs.\u003c\/p\u003e\u003ch2\u003eExact Parts Number for Tillotson Carburetors\u003c\/h2\u003e\u003cp\u003eFinding the correct parts number is vital when rebuilding your kart's fuel system. The 78A-256 is the exact OEM replacement for most Tillotson carburetors, including the HL, HB, HX, HM, and HW models. By distributing pressure evenly across the O-ring, this brass washer ensures a leak-free seal on both the high and low-speed fuel circuits. Whether you are sourcing components from a local go karts shop near me or ordering specialized comet parts online, insisting on genuine Tillotson hardware guarantees your tuning adjustments remain locked in place.\u003c\/p\u003e\u003ch2\u003ePrecision Tuning and Reliability\u003c\/h2\u003e\u003cp\u003eDon't let a missing or worn washer ruin your race weekend. If you've been searching for go karts for sale near me, you already know that maintaining a high-performance machine requires attention to the smallest details. This washer facilitates easy disassembly for cleaning and supports the fine-tune adjustments necessary for optimal RPM output.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Tillotson Quality:\u003c\/strong\u003e Genuine 78A-256 replacement guarantees exact fitment and reliable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eO-Ring Protection:\u003c\/strong\u003e Acts as a solid barrier, preventing the adjustment spring from cutting into the rubber O-ring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak-Free Seal:\u003c\/strong\u003e Maintains critical pressure on the fuel circuits to prevent air leaks and fuel starvation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Fits the high and low-speed adjustable mixture screws on HL, HB, HX, HM, and HW carburetors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Brass:\u003c\/strong\u003e Withstands harsh racing fuels and extreme engine temperatures without degrading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Tuning:\u003c\/strong\u003e Locks in your adjuster needle positions so your engine stays responsive through every chicane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Maintenance:\u003c\/strong\u003e Facilitates quick, hassle-free disassembly when cleaning or rebuilding your carburetor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Where exactly does the 78A-256 brass washer sit in the carburetor assembly?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This washer is designed to be placed on the mixture screw between the tension spring and the rubber O-ring. It acts as a protective barrier to ensure the spring does not dig into or deform the O-ring during adjustment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is it important to use a brass washer instead of a standard steel one?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Brass is corrosion-resistant and provides the ideal surface hardness to protect the O-ring from the spring's tension without causing premature wear or chemical degradation when exposed to racing fuels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this washer fit my Tillotson carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The 78A-256 is a standard OEM component compatible with most Tillotson HL, HB, HX, HM, and HW series carburetors. It is the correct size for both high and low-speed mixture screw assemblies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should I replace this washer every time I rebuild my carburetor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. If you are replacing your O-rings and springs during a rebuild, you should always inspect the washer. If it shows signs of grooving or deformation, it must be replaced to ensure a consistent, leak-free seal.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-spring-24b-449-tns\"\u003eReliable Adjuster Needle Spring 24B-449 for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adjuster-needle-o-ring-44-361-44-270-tno\"\u003eDurable Adjuster Needle O-Ring for Tillotson Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-low-speed-hl357a-43-388\"\u003ePrecision Adjustable Low-Speed Needle HL357A for Tillotson Carbs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/adj-needle-hi-speed-hl348e-43-966-til-43-966\"\u003eTillotson HL348E High-Speed Adjustable Needle - OEM Part 43-966 - Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tillotson-complete-rebuild-kit-oem-double-stack-rk-104hlr\"\u003eOEM Tillotson Complete Rebuild Kit for Double Stack Carburetors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SwiftKarting","offers":[{"title":"Default Title","offer_id":52381123445055,"sku":"TNW","price":1.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/6843\/4239\/files\/tillotsoncarbs-adjuster-needle-washer-78a-256-tnw.jpg?v=1773223945","url":"https:\/\/metro-merch-3.myshopify.com\/products\/tillotson-78a-256-brass-mixture-screw-washer-high-low-side-oem-carburetor-part","provider":"Metro Merch","version":"1.0","type":"link"}