There are no reviews for this product so I will give you my feedback. Sometime ago I bought a secondhand MS261 with the common worn crank. I found a replacement from Germany and completed a full rebuild. The genuine carb was worn and I initially purchased a non genuine replacement. This was of poor quality and I have never been able to properly tune the saw. I was reluctant to purchase the machinetec carb due to the previous experience but took the plunge. After an initial issue with purging the new carb it fired into life. It’s like night and day believe me. Using a taco the saw tuned perfectly and runs like a dream. Highly rated product!!