Parts for Briggs & Stratton 121602-0331-E1: Camshaft, Crankshaft, Cylinder, Engine Sump, Lubrication, Piston Group Parts

Seals between crankcase and crankshaft to prevent oil leaks and contamination. Replace if you notice oil pooling or engine performance issues.

This part is a breather gasket. This specific breather gasket is manufactured for use with small engines. The breather gasket forms a seal between the breather and the cylinder. The breather itself relieves the pressure that is inside of the crankcase by allowing the air to exit but not allowing the air to enter. A new breather gasket may be needed if the breather itself seems to be clogged. It can sometimes become clogged with oil. It's recommended to replace the breather gasket any time the breather itself is serviced to ensure that a proper seal is maintained. This part is a genuine Midwest Engine part and is an OEM part sourced directly from the manufacturer and it is sold individually. This specific breather gasket is compatible with engines, lawnmowers, and generators that are manufactured by Midwest Engine, Briggs and Stratton, Toro, and Lawn Boy.

Crankcase gasket creates an airtight seal to prevent oil and air leaks. Replace when deteriorated from heat and pressure. Confirm fit with model number.

Lower oil seal prevents engine oil leaks in small lawn and garden engines. Replace if you notice oil pooling or reduced performance. Verify fit with your engine model number.

Engine won't restart after hitting an object? A sheared flywheel key is often the cause. This small part keeps the flywheel connected to the crankshaft.

Piston ring set for small engines. Installs around the piston to maintain compression. Replace if rings are worn, cracked, or broken for proper seal.

Fix engine knocking or power loss with this piston pin lock. Secures the piston pin in small engines. Basic mechanical skills needed for installation.

This screw is a genuine Midwest Engine replacement part for small engine appliances, including lawn tractors, lawn mowers, snowblowers, leaf blowers, vacuums, and tillers. The purpose of a screw is to tightly link materials together through rotation that pierces into the material. A screw might have to be replaced in the event that it is lost or misplaced, a common occurrence due to its size. A screw might also be replaced if it deteriorates over time, through erosion, cracking, or piercing, thereby reducing its efficacy in holding materials together. This kind of damage can be attributed to general overuse, to age, or simply to long-term exposure. If a screw is subject to any of this kind of damage, it is best to replace it immediately, as the materials held together by the screw must continue to be held together. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This screw is compatible with the following brands: Briggs & Stratton, Toro, Cub Cadet, and Lawn Boy.

Secures components like gas tanks on small engines. Replace if stripped, damaged, or lost. Flange design distributes clamping force evenly. Verify fit.

Engine dipstick for checking oil levels. Replace if cracked, bent, or missing seal to prevent leaks and ensure accurate readings. Verify fit with model number.

Replace your engine dipstick tube seal to prevent oil leaks and maintain proper lubrication. Essential when oil seeps around the dipstick. Verify fit with your model.

Fix oil leaks around your dipstick with this engine O-ring seal. Prevents debris from entering oil system. Simple install stops leaks and protects motor.

Complete dipstick and tube assembly for small engines. Replaces cracked, broken, or missing dipstick tubes. Essential for checking oil levels.