Parts for Mtd Z478-SU: Engine Parts

Fuel tank nipple connects fuel lines to the tank on small engines. Replace if cracked, leaking, or worn to restore proper fuel line connections.

M6 x 1 flange bolt for outdoor power equipment. Secures engine covers, handles, and components. Replace if stripped, rusted, or missing threads.

This is a genuine replacement ignition key that is manufactured by MTD for use in select models of outdoor power equipment. The ignition key is a plastic piece that is inserted into the ignition cylinder to start the machine. Turning the plastic key will signal to the engine to fire. This is a durable plastic piece, but it can become damaged or lost over time, which will render the machine unable to start. Replacing it will be necessary in order to operate the unit. This genuine OEM ignition key is manufactured to exact standards. It can be used in snowblowers and snow throwers from MTD, Yard Machines, Troy-Bilt, Cub Cadet, Yard-Man, and Husky. The durable plastic key is sold as an individual unit and does not require any tools for installation. This is a simple replacement that should only take a couple of minutes. In the event that the old key is damaged or stuck in the ignition, it may take more effort. It is important to disconnect the power supply for safety before performing any repairs, as well as to wear gloves for hand protection.

Fix engine starting problems, rough idle, or stalling with this carburetor rebuild kit. Restores proper fuel flow in 30-45 minutes with basic tools.

Replace a leaking or damaged oil drain assembly on your snowblower engine. Includes valve for easier oil changes. Basic hand tools required.

Engine won't start or has low compression? This short block assembly restores power to snow throwers and lawn equipment. Intermediate repair, 2-4 hours.

Snowblower won't start or pulls hard? This recoil starter assembly restores reliable pull-start function. Common repair for worn or broken recoil.

Snowblower won't start or shuts off unexpectedly? This ignition switch controls engine power. Direct replacement part restores reliable starting.

Flange bolt for lawn equipment and outdoor power tools. Secures engine components and assemblies. Replace if bolt is stripped, missing, or damaged.

This is a small engine spark plug positioned in the engine cylinder head. It supplies the spark that will ignite the air-fuel mixture to enable an engine to produce power. This particular spark plug is designed with superior corrosion resistance and dependable performance. Small but mighty, this component allows for increased conductivity and heat control. If the spark plug is damaged or in poor condition, many problems may arise in equipment, including sudden stop while running, overheating, and excessive gas consumption. Replace the spark plug by disconnecting the spark plug wire first, then use a socket driver or wrench to remove the spark plug. Install the new spark plug by turning it by hand initially to avoid cross-threading. If it doesn't twist anymore, use a deep socket wrench or socket driver to tighten the plug until snug. The spark plug can also be used to tune up outdoor power equipment or improve a small engine. This part is recommended to be replaced once per season. This part works with lawn mowers, snowblowers, tillers, leaf blowers, log splitters, wood chippers, and others with small engines. It is compatible with brands such as Craftsman, Cub Cadet, Troy-Bilt, Murray, Yard Machines, MTD, Huskee, Bolens, Yard-Man, and MasterCut. This is a genuine OEM part directly from the manufacturer and is sold individually.

Muffler gasket seals exhaust connection on snow throwers. Replace if exhaust leaks or noise increases. Verify fit with your model number before ordering.

Rocker stud bolt that secures the rocker arm assembly in small engines. Replace if threads are stripped, bolt is bent, or stud is broken or missing.

Fixes engine misfires and rough running caused by improper valve clearance. This adjusting nut helps restore correct valve timing on lawn mowers and tillers.

The carburetor insulator gasket, or intake gasket, sits between the carburetor and the combustion chamber of a gasoline powered engine. This gasket provides a perfect seal that serves two purposes: to keep the fuel/air mix in the carburetor from experiencing too much heat before entering the combustion chamber and to prevent air or fuel from leaking. This particular gasket is used in a variety of small gasoline powered tools, including one- and two-stage snow blowers, log splitters, and other engine applications. This gasket continually experiences air, fuel, and heat extremes during use, and over time, the gasket may become warped or so worn that it becomes ineffective, allowing leaks to develop. When an insulation gasket begins to leak, there are some typical signs, including a very hot engine, stalling, sputtering, lack of power, and unusually high gas consumption. The carburetor must be removed in order to replace this gasket, which sits between the carburetor and intake manifold. When replacing this part, it is best to use a gasket such as this one, which is a genuine OEM replacement part, manufactured to be identical to the original part. This gasket is compatible with machines offered by Craftsman, Cub Cadet, Yard Machines, MTD, and Troy-Built.

Insulator gasket that seals between the carburetor and engine block on snow throwers. Replace if cracked, torn, or missing to prevent air leaks.

Carburetor gasket seals the insulator and carburetor connection for proper engine compression. Replace if your engine runs rough, misfires, or leaks fuel.

Carburetor assembly for snow throwers and gas snowblowers. Installs on the engine to mix air and fuel. Replace if cracked, leaking, or corroded.

This is a genuine OEM replacement governor arm sourced directly from the manufacturer for use on various snowblower and snow thrower engines. It is part of the mechanical governor system that controls the carburetor throttle to maintain steady speed regardless of how much stress the engine is under. The governor arm is located on the governor cross shaft. One end is connected to the governor spring and the other is connected to the throttle linkage. The governor arm is pushed in one direction and pulled in another to increase and decrease the throttle speed. If the throttle will not rev or gets stuck in one position, the throttle arm may be the cause. This part could be damaged in impact, for example of the blower is dropped or tips over. If this occurs, the throttle arm will need replaced.Remove the spark plug and drain the fuel before working on the governor. Remove the governor spring and detach the governor arm from the linkage. Install the new governor arm and reattach the spring. Replace the blower parts. Fuel the blower and test. Adjust the governor as needed.The governor arm is a metal part that is sold as an individual unit. It is compatible with snow blowers and snow throwers manufactured by MTD, Yard Machines, Troy-Bilt, and Cub Cadet.

Governor spring for snow throwers and small engines. Installs on the governor linkage to control engine speed. Replace if stretched, broken, or missing.

Throttle return spring installs on snow thrower engine to control throttle opening and closing. Replace if stretched, broken, or missing from linkage.

Secures engine and frame components on lawn mowers and snow throwers. Replace if stripped, rusted, or missing to keep parts firmly attached.

M6 flange bolt for lawn and garden equipment engines. Replaces broken, stripped, or missing bolts. Secures engine components and covers.

Engine won't start or runs rough in cold weather? A faulty choke assembly prevents proper fuel mixture during startup. Direct replacement part for snow throwers.

Replacement fuel tank for snow throwers and gas snowblowers. Holds gasoline for engine operation. Replace if cracked, leaking, or damaged.

This is a genuine MTD fuel cap replacement made for use on select snowblowers. It features a molded gasket for secure sealing and less risk of losing parts. The fuel cap is responsible for securing the fuel in the fuel tank during operation so that it doesn't spill out. There is an air hole in the cap to prevent pressurization of the fuel, ensuring safe operation at all times. This cap is made of plastic and it can become cracked or stripped with regular use. If it is damaged, the fuel will not be secure and the machine will not be safe to use. That will require an immediate replacement. This OEM fuel cap is made to exact standards by MTD and is compatible with several models of snow blowers and snow throwers. It is also capable of fitting select models from Yard Machines, Troy-Bilt, Cub Cadet, Yard-Man, and Husky. It features an easy plastic grip and a seal to prevent spillage. It can be installed with no tools and is sold as an individual unit. It is easy to screw the new cap into place, but be sure to thread the screw properly to prevent accidental stripping or misthreading that can cause the cap to get stuck.

Fuel filter for small engines on snowblowers, tillers, and lawn equipment. Replace annually or if engine runs rough to ensure clean fuel flow. Verify fit with your model number.

Throttle control knob for snow throwers and gas snowblowers. Replaces broken, cracked, or missing throttle knobs for smooth engine speed adjustment.

Secures engine components and mounts on outdoor power equipment. Replace if bolt is stripped, damaged, or missing to ensure proper assembly and fit.

Engine won't start after sudden stop? A sheared flywheel key breaks the connection between crankshaft and flywheel. Simple DIY repair.

Flat washer for engine recoil starter assembly. Replaces worn, missing, or damaged washers during recoil maintenance or repair. Ensures proper spacing.

Replaces a cracked, hardened, or broken primer bulb on gas-powered engines. Installs on the carburetor to inject fuel for priming before starting.

Creates a leak-proof seal between the fuel drain plug and tank. Replace if you notice fuel leaking from the drain area. Verify fit with your model number.

Snow thrower won't start when you pull the cord? A broken or loose starter handle prevents engine starting. Easy 10-minute fix for most models.

Seals the fuel bowl to prevent leaks and keep dirt out of your fuel system. Replace when cracked or leaking. Confirm fit with your model number.

Fix fuel leaks or loose carburetor connections with this fuel bowl mounting bolt. Secures the fuel bowl to prevent sediment clogs. Quick 5-minute fix.