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- No o-ring groove (early style) - Fits Super B; D; E; G and 2-T (two throat) carbs. Note: Never overtighten idle mixture screws in E and G carburetors. It is very easy to damage the angled idle mixture screw seat in soft aluminum carburetor housing. This is very hard or impossible to repair. It can result in irregular idling. Note: The early style (approx. pre-2012) mixture screw (MCS 977815) is not interchangeable with the late style (approx. 2012-up) mixture screw (MCS 940521) o-ring type mixture screw. The late style carburetor body housing can be identified by the text ''Made In USA'' next to the text ''SHORTY''.
Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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