MTD 631-04381  Oil Cap and Bulb Assembly

The Oil Cap attaches to the oil tank to allow easy access to open and seal your oil tank. Never operate your equipment without a properly sealed Oil Cap as a missing or damaged cap can allow oil to spill out, as well as allowing dirt and debris to get in. Contaminants in the oil system create stress on the oil filter and potentially cause damage to the carburetor, cylinder, or pistons. When replacing an Oil Cap, find the exact one for your model as many include a unique dipstick and some are vented.