The Jiffy Tune-Up Kits contain engine oil as well as a spark plug. Each kit is specific to the engine it is to be used with. The two-cycle engine tune-up kits contain premium 40:1 two-cycle smokeless synthetic blend engine oil with fuel stabilizer as well as the correct spark plug. The four-cycle engine tune-up kit contains premium 4-cycle synthetic engine oil as well as a premium four-cycle spark plug.
Model #4005 is for use with Jiffy 2500 & 3500 series engines and the Tecumseh 2 H.P. engine.