Usage Tips:Replaces Part Number: 1143-120-0641 1143-120-0631 1143-120-0611 carburetor, Replaces for Zama C1Q-S295 C1Q-S296 C1Q-S233, Replace for Walbro WTF-9 Carburetor Air Filter Tune Up Kit For Stihl MS231 MS231C MS231Z MS251 MS251C MS251CBE MS251C-BEQ MS251Z Chainsaw (Primer Bulbe Type) [High Quality Material]Using this carburetor kit can ensure your chain saw runs smoothly, improve engine performance, and can effectively solve oil leakage, difficult starting, inability to accelerate, black smoke from the exhaust pipe, ETC. [Excellent Quality] This carburetor kit is made of first-class materials, each one is factory tested to ensure stable engine performance, easy installation, and can effectively increase the service life of your chain saw VALUE KIT: Make maintenance easy with our carburetor assembly kit. It offers excellent value and is a cost-effective solution to keep your chain saw running optimally. These parts are simple and easy to use, and installation videos are easy to find on the web and take only 5-10 minutes to install. Note: This is for the E-Z Starter Version for Stihl MS251C Chainsaw, If your MS251 saw have a primer bulb, this is the correct carburetor kit for you. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:As Shown Material:Metal Package Contents: 1 * carburetor kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.