Parts for Briggs & Stratton 44Q977-0122-B1: Cylinder Head, Rocker Arm Cover, Intake Manifold Parts

Replace your engine cylinder head if your lawn mower won't start, runs rough, or loses compression. Closes the combustion chamber for smooth operation.

Fixes oil leaks, coolant mixing, or overheating issues. Creates seal between cylinder head and engine block. Clean surfaces before installing.

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.

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

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.

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.

This replacement exhaust gasket is a certified genuine OEM part for a lawn tractor engine. This gasket helps to seal off the exhaust from the carburetor. For an engine to run, it must first mix fuel with air to prepare the fuel for combustion. By sealing off the exhaust, this gasket allows for fresh air to enter into the carburetor from outside the engine rather than from the exhaust. Gaskets often degrade over time due to the stress of pressure and heat. If the exhaust gasket breaks its seal, it can affect the engine's overall performance. Be on the lookout for an especially noisy engine that doesn't provide as much power and is less fuel efficient. There may also be a noticeable burning smell coming from the engine. To replace the exhaust gasket, use a socket wrench and wrench set to remove the air filter and blower housings, then remove the exhaust manifold and switch out the gasket. This replacement exhaust gasket is compatible with engines made by Toro, Briggs & Stratton, Murray, Snapper, and Simplicity. It comes sourced directly from its original manufacturer and does not include any additional hardware.

Seals the cylinder head to prevent oil leaks on small engines. Replace when oil consumption increases or leaks develop. Verify fit with your model number.

This pushrod serves a vital part of the camshaft in a lawn tractor’s engine. As the camshaft spins, the pushrods open the engine valves to intake air and release the exhaust. Without a functioning push rod, the engine cannot run properly. There are two push rods in an engine made of steel and aluminum, respectively. This item is the longer, 6in steel rod. Be sure to replace the correct part. Pushrods should last for 200,000 miles of wear and tear but can be broken by harsh use. The pushrod needs replacing when the engine starts misfiring or will not run at full power. The most common problem is a bent pushrod. This part is a genuine OEM replacement part straight from the manufacturer. This item is made by Briggs & Stratton, though Toro and Vanguard both make identical parts. Again, this is the steel variety of pushrod, and it is sold individually. Aluminum pushrods are sold separately.

This pushrod is a metal rod that is used in overhead valve engines. It transfers the motion of the camshaft within the engine block to the valves within the cylinder head. One end of the rod is fitted with a lifter that contacts the camshaft. Rods can slip or wear with time and may even break or bend. The pushrod is used within the exhaust valve, and it may become stuck or damaged and require replacement. However, it is not always the rod that is the root of the problem. Malfunctioning valves or bad fuel can be behind bent or broken rods, so a bit of diagnostic work is best done while making the replacement of the rod or associated valves. This is an OEM aluminum push rod replacement designed for use with engines on several Briggs & Stratton, Toro, and other lawn tractor engines. This durably made pushrod sold individually.