Having all the parts handy can make a challenging job easier. Changing an impeller can be straight forward or it can be a bear. Either way having all the parts you need will help speed up the process and perhaps make the job a little easier. Sierra packages impeller kits to save you time; all of the research and sourcing of individual parts has been done. Each component in the kit is engineered to meet or exceed manufacturers specifications. We recommend having a spare impeller (Sierra p/n 18-3039) for unexpected failures caused by debris or clogged intakes. Key Features Engineered to meet or exceed OEM specifications Kit includes impeller (Sierra p/n 18-3039), impeller plate and O-ring How to find the impeller kit you need Select your impeller kit by locating the OEM part number in the table below. If you don't know the OEM part number, please visit our Engine Parts Selector, where you can search by engine make, model, horsepower, serial number and year of manufacturer. ApplicationOEM Part NumberGLM12270We offer a variety of Sierra engine parts for most engine applications on the water today—including MerCruiser, OMC, Johnson/Evinrude, Volvo and more.