This 2006 Mercury 135HP Optimax 2 Stroke Powerhead CrankCase is a reliable and high-performing addition to your outboard engine. With a warranty period of no warranty, this powerhead is designed to provide you with a hassle-free experience. It is compatible with a range of Mercury engines and parts, including the 879808T07, 879808T01, 858961A8, and 0T794955. The engine is built to last and provides you with a reliable power source for your outboard activities. It is a great choice for those who enjoy spending time on the water and engaging in water sports. This powerhead is easy to install and use, making it an ideal addition to your boat parts and accessories collection. Good compression when tested.