Parts for Briggs & Stratton 40U877-0003-G1: Cylinder Head / Intake Manifold Parts

Engine losing compression or running rough? This cylinder head restores proper engine performance. Moderately challenging repair for lawn and garden engines.

Engine won't start or runs rough? A damaged cylinder head disrupts airflow and valve operation. This replacement part restores proper engine performance.

Here is a metal cylinder head screw replacement that is compatible with a wide range of engines. The screw is typically used as a means to fasten various components together in the engine. This includes securing the cylinder head components. However, it could be used for other applications in some machines. Owners can check their diagrams to see how and where the screws are used. The cylinder head screws are subject to the usual wear and tear, as well as corrosion. When the threads are stripped, they begin to corrode, become bent, or are otherwise damaged, they should be replaced. Replacing the screws tends to be a fast and simple repair. This genuine OEM cylinder head screw is made from high-quality durable metal. It is sold individually, so buyers may want to purchase several at the same time. The screw can be used in a range of machines including lawn mowers, snowblowers, leaf blowers, wood chippers, generators, tillers, pressure washers, and other small engines. Brands with compatible models include Briggs & Stratton, Toro, Cub Cadet, Murray, Lawn-Boy, Simplicity, and MasterCut.

Replace a worn keeper valve if your small engine has valve train noise or poor compression. This small retaining clip secures valves in lawn mowers and outdoor power equipment.

The spark plug helps to start the engine by creating the spark that will cause the fuel to ignite in the engine during combustions. Over time, the spark plugs will become worn down and go bad. Multimeters are typically used to test the spark plugs. However, owners should also regularly look at the spark plugs to search for signs of corrosion that could indicate they are going to go bad. If they are not functioning properly, the engine will not fire and start. They will need to be replaced. This is an OEM replacement part that can be used on a range of small engines and lawn equipment from many brands. Compatible brands include Toro, Briggs & Stratton, Craftsman, Cub Cadet, Simplicity, and Snapper.

Engine won't start or runs rough? A cracked or missing spark plug boot causes misfiring and prevents proper ignition. Easy DIY replacement part.

Small but essential hardware nut for lawn and garden engines. Secures components in place when used with washers and screws. Replace if stripped or worn.

This replacement valve seal is a genuine OEM part for a lawn tractor or mower. The valve stem is a type of valve that transfers oil into the cylinder and then immediately reseals due to the pressure in the chamber. However, if the seal is damaged, it will not close and oil will leak into the cylinder. If this happens, the cylinder head may become overly lubricated and not run well. This seal helps prevent that from happening. It fastens to the intake valve and valve stem keeper. Seals will naturally wear out over time due to stress and exposure to corrosive oxidizing agents in an engine. When this happens, the valve will leak oil. To test if the valve seal is compromised, look for whitish-grey smoke that indicates burning oil and also measure to see how much oil the engine is consuming. If the seal is breached, use a screwdriver and socket wrench set to change out the part. This top of the line replacement valve seal is compatible with Briggs & Stratton, Toro, and Lawn Boy lawn tractors. It is sourced from the original manufacturer and ships individually.

Vacuum hose for lawn and garden engines. Connects to the carburetor or fuel system. Replace if cracked, split, hardened, or leaking to restore proper airflow.