𝐏𝐫𝐞𝐜𝐢𝐬𝐞 𝐂𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐢𝐥𝐢𝐭𝐲 : This RB-100 Carburetor Rebuild Kit is designed to fit Stihl models HS45, FS55, FS38, BG45, MM55, and Mini Tiller 4137, along with various Zama C1Q-S carburetor series (C1Q-S69, C1Q-S70, C1Q-S71, C1Q-S73, C1Q-S79, and more). Ensure the correct part by confirming your engine's model and part number before purchase. 𝐄𝐱𝐚𝐜𝐭 𝐑𝐞𝐩𝐥𝐚𝐜𝐞𝐦𝐞𝐧𝐭 𝐟𝐨𝐫 𝐙𝐚𝐦𝐚 𝐑𝐁-𝟏𝟎𝟎: Directly replaces the Zama RB-100 carburetor repair kit, providing a high-quality, seamless replacement for your trimmer's carburetor, fuel line, and primer bulb. 𝐄𝐧𝐡𝐚𝐧𝐜𝐞𝐝 𝐄𝐧𝐠𝐢𝐧𝐞 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 : The carburetor repair kit optimizes the fuel-air mixture for smoother combustion, ensuring your trimmer runs smoothly and efficiently for longer periods. 𝐁𝐮𝐢𝐥𝐭 𝐭𝐨 𝐋𝐚𝐬𝐭: Crafted from corrosion-resistant and wear-resistant materials, this carburetor rebuild kit offers exceptional durability, ensuring reliable, long-lasting performance under demanding conditions. 𝗖𝗢𝗡𝗙𝗜𝗗𝗘𝗡𝗧 𝗣𝗨𝗥𝗖𝗛𝗔𝗦𝗘𝗦: Enjoy a 30-day return window on your purchase. Your satisfaction is our priority. If you have any questions, please don't hesitate to contact our customer service team. RB-100 Carburetor Rebuild Kit with Primer Bulb