I used this kit to rebuild the carb on my 1989 Mariner 20 two stroke outboard. The motor sat in stored in a barn for 15 years and it was NOT fogged before storage. I removed the carb, took it apart, chem dipped it, then put it back together using the seals and gaskets from this kit. You can see in the photo the dry rot on the old fuel pump diaphragm. The motor runs like new now!!!! I highly recommend this kit.