Parts for Briggs & Stratton 303777-0333-03: Cylinder Head, Valves, Gasket Set - Valve Parts

Seals between cylinder and engine block to prevent compression loss and oil leaks. Replace if you notice oil leaking or loss of power. Verify fit with your engine model number.

Replace your engine's breather tube if it's cracked, damaged, or missing. This tube vents crankcase pressure and installs between the engine block and air filter.

Engine losing compression or running rough? This valve spring maintains proper valve operation. Direct-fit part for small engines. Restores performance.

Engine losing compression or running rough? This valve spring maintains proper valve operation. Direct-fit part for small engines. Restores performance.

Engine runs rough or valves aren't opening correctly? This metal valve tappet converts camshaft rotation to linear valve motion. Direct replacement part.

This is an intake gasket that is used in lawnmowers and other yard and garden equipment with a small motor. The intake gasket is a component that rests between the intake manifold and carburetor and creates an air-tight seal for the carburetor to ensure it has the best possible performance. It is made from a com material and over time, it can start to break down and will need to be replaced. If the intake gasket isn't working correctly, it can cause decreased power, engine misfires, engine overheating, and leaks. Sometimes the intake gasket can also break and require a replacement. A wrench will be needed to install a new component to get the lawn equipment up and running again. The carburetor will need to be removed from the machine and taken apart to get access to the gaskets so they can be replaced.This intake gasket is an authentic OEM replacement part directly sourced from the manufacturer. It is sold as an individual component. The intake gasket is compatible with lawnmowers, wood chippers, snowblowers, and generators manufactured by Simplicity, MTD, Snapper, Cub Cadet, Toro, and Briggs & Stratton.

Sealing washer creates a tight seal between engine components to prevent leaks. Replace if you notice oil or fluid leaks. Verify fit with your model number.

Fix misfiring, hard starting, or no spark issues with this spark plug boot. Connects spark plug to magneto on lawn mowers and small engines. Easy DIY fix.

This part is a replacement valve seal. This is a genuine OEM part made by Midwest Engine and has been sourced directly from the manufacturer. This part's intended use is to replace a broken or defective valve seal in several types of outdoor power equipment.This particular valve seal is intended to create a seal for the tappet valve within the engine. The tappet valve helps to open and close the engine's intake or exhaust valve. This part may become worn or broken over time, requiring replacement. It's important when working on or near an engine to make sure the equipment is powered off and completely cooled down before starting any repairs. Access to proper tools is recommended before attempting this part installation. For more accurate information on how and where to install this valve seal, reference the appropriate owner's manual and specific equipment diagrams.This is an authentic OEM replacement part made of high-quality materials. This part can be used with small engine outdoor power equipment that have been manufactured by Midwest Engine. Sold individually.

Seals connection between engine and exhaust system on lawn and garden equipment. Replace if exhaust leaks or gasket shows cracking. Verify fit with model.

Seals oil into the camshaft area of your engine. Replace when leaking oil or during valve cover maintenance. Confirm fit with your engine model number.

Replace a bent, worn, or damaged push rod in your small engine. This internal component transfers motion from the camshaft to the valve rocker arms.

Fix engine valve timing issues with this push rod. Connects camshaft to exhaust valve for proper operation. Essential part for restoring engine performance.