Parts for Briggs & Stratton 123J00 (0100-0188): Cylinder / Crankshaft Parts

Replace your blown cylinder head gasket to stop oil and coolant mixing. Prevents overheating and engine damage. Requires wrenches and screwdrivers.

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

This genuine Midwest Engine screw can be used as a replacement part for a variety of outdoor lawn and garden appliances including lawn mowers, snowblowers, tillers, pressure washers, generators, leaf blowers, edgers, and wood chippers. A screw might have to be replaced within the lifespan of one of these types of outdoor appliances. Tthis is a common occurrence as screws are small components that are easily lost and misplaced. Screws can also loosen over time, necessitating a replacement. If this is the case, the screw should be replaced with this OEM replacement part. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This is an OEM part sourced directly from the manufacturer. It is sold individually. This screw is compatible with the following outdoor appliance brands: Midwest Engine, Briggs & Stratton, Craftsman, Toro, Cub Cadet, Lawn Boy, Simplicity, and MasterCut.

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

Outer trim panel for lawn and garden engine control area. Replaces cracked, dented, scratched, or warped facia. Restores finished appearance.

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.

Replace a worn valve retainer if your engine has compression loss or valve train noise. This washer-shaped part secures the valve spring lock on the valve.

Replacement mounting screw for lawn and garden engines. Secures components together during operation. Replace if stripped, missing, or damaged.

Flange screw for lawn and garden engines. Distributes connection force over a larger area. Replace if threads are stripped, head is damaged, or screw is missing.

Mounting screw for lawn and garden engines. Secures engine components and covers. Replace if stripped, corroded, missing, or damaged during maintenance.

Fix poor engine performance and hard starting with this carburetor overhaul kit. Restores proper fuel mixture for lawn mower and trimmer engines.

Fix a flooded carburetor with this float. Controls fuel flow to the carburetor bowl, preventing flooding and ensuring proper air-fuel mixture.

Operating and installation manual for small engines and outdoor power equipment. Essential reference guide for proper setup, maintenance procedures, and safe operation instructions.

This genuine Briggs & Stratton governor link can be used as a replacement part for appliances operated by small engines, including lawn tractors, lawnmowers, snowblowers, leaf blowers, vacuums, tillers, and generators. The function of a governor link on a small engine appliance is to set the throttle to run at a steady speed. A governor link might have to be replaced if it withstands enough damage to prevent the governor link from keeping the throttle running and keeping the rest of the engine's governor assembly in place. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This governor link is compatible with the following brands: Midwest Engine, Briggs & Stratton, Toro, Cub Cadet, and Simplicity. This part is sold individually.

Engine racing or won't maintain steady speed? This governor spring controls fuel flow and throttle tension. Common fix for acceleration issues. DIY repair.

Sealing washer creates a leak-proof seal in your lawn and garden engine. Replace when worn or cracked to prevent oil or fuel leaks. Confirm fit.

The muffler on a lawn or garden machine is meant to cut down on the amount of noise that comes from the engine. It will also prevent sparks from the exhaust system from igniting materials beneath the machine (such as dried grass or other debris). A muffler can wear out after only a few seasons because of the amount of use, the level of dried soot from the engine, and from any holes or cracks that can form in the housing or hoses. This OEM replacement muffler works on a long list of brands of lawn and garden machines, including those from Briggs & Stratton, Cub Cadet, Toro, and Simplicity. It will work with an array of small engines, pressure washers, chippers, and lawn mowers. It ships as a full replacement, including gasket and bolts as well as muffler assembly.

Metal mounting screw for lawn and garden engines. Secures components together throughout the equipment. Replace when stripped, rusted, or missing.

Engine won't start? A worn pawl friction plate in the starter assembly prevents cranking. This small engine part transfers power to the starter cup.

Secures engine components on gas line trimmers. Replace this mounting nut if it's stripped, corroded, missing, or no longer holds parts firmly in place.

Replacement screw that secures the pawl friction plate in lawn and garden engines. Replaces lost, stripped, or damaged flange bolts on the recoil assembly.

Engine won't shut off when you turn the key? Replace your lawn mower's stop switch to restore safe engine control. Simple safety repair.

Fix a stretched or broken starter rope spring with this friction spring. Prevents pulley damage and overstretching. Fits small engines on snow throwers, pressure washers, and generators. Easy DIY repair.

This exhaust gasket is a genuine Midwest Engine replacement part for appliances operated by small engines, such as chipper shredders, snowblowers, leaf blowers, and lawn mowers. An exhaust gasket's purpose in the engine is to create a sealed layer between the carburetor and the exhaust tube to keep dirt and debris out of the infrastructure of the engine. A malfunctioning or broken exhaust gasket could compromise the seal between the carburetor and the exhaust tube, meaning that dirt and debris could get into the engine and cause damage. An exhaust gasket could be subject to damage from overuse and is generally known to require replacement over time from general wear and tear. If the exhaust gasket seal is compromised, it should be replaced immediately. Evidence of dirt and debris compromising an engine could take the form of oil leaking from the carburetor, black smoke pluming from the exhaust tube, and lower engine pressure than usual. This exhaust gasket is compatible with the following brands: Briggs and Stratton, Cub Cadet, and Toro. This part sold individually.

This spring brake is a genuine Midwest Engine part that can be used as a replacement part for outdoor appliances with small engines, including lawn mowers, chipper shredders, snowblowers, and other such appliances. Spring brakes are a braking system employed a large, coiled spring that is kept under high tension; the control valves attached to the spring brake are the mechanism by which the spring brake is released.If the spring brake has been damaged, is malfunctioning, or is in a state of disrepair, this will manifest in the form of a sudden, volatile eruption from the air brake chamber. This is a dangerous state for a small engine, so repair should be conducted immediately. Additionally, a new spring brake part should be ordered before any attempt to use the appliance without a proper repair. Remember to always wear gloves when handling, repairing, and operating outdoor equipment, and stay safe around the small engine of the appliance if the spring brake has malfunctioned and caused a dangerous situation.This spring brake is compatible with the brands Briggs and Stratton, Cub Cadet, and Toro.

Replaces a cracked, missing, or worn fuel cap on lawn mowers and outdoor power equipment. Ensures a secure seal to prevent fuel evaporation and leaks.

This genuine Midwest Enginescrew can be used as a replacement part for appliances operated by small engines, including lawn tractors, lawnmowers, snowblowers, leaf blowers, vacuums, tillers, and pressure washers. The function of a screw on a small engine appliance is to fasten materials together through rotating such that the screw pierces into the materials to attach them. There are several reasons why a screw might have to be replaced. As they are a small part, screws might have to be replaced if they are lost or misplaced. These misplacements are a common occurrence for owners of small engine appliances while they do repairs. Additionally, screws may suffer damage over time in the form of rusting, stripping, erosion, or other deterioration and should be replaced if the damage hampers their ability to keep materials fastened to each other. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This OEM screw is compatible with the following brands: Midwest Engine, Briggs & Stratton, Toro, Cub Cadet, and Snapper. This part is sold individually.