This is a genuine OEM replacement part, it is sold individually.
Mulching blades have a more curved style surface and frequently include extra cutting surfaces along the blade edges.
This blade is designed for all the models listed below.
If used correctly with the mulching plug that is inserted into the mower, the clippings will stay under the deck longer and get re-cut.

This is an OEM replacement part and is sold individually.
Its propose is to deliver an electric current from an ignition system to the combustion chamber of a gas fueled engine.
It will ignite the air fuel mixture by the spark.
Spark Plugs will usually have to gapped to the manufactures specifications found in the owners manual.

Over time a Spark Plug will become fouled because the air/fuel ratio may be set wrong,worn piston rings, carbon build up and other factors.
It is better to replace a fouled spark plug, rather then trying to clean it.

A carburetor basically consists of an open pipe through which the air passes into the inlet manifold of the engine.
The pipe is in the form of a Venturi: it narrows in section and then widens again, causing the airflow to increase in speed in the narrowest part.
Below the Venturi is a butterfly valve called the throttle valve — a rotating disc that can be turned end-on to the airflow, so as to hardly restrict the flow at all, or can be rotated so that it (almost) completely blocks the flow of air.
This valve controls the flow of air through the carburetor throat and thus the quantity of air/fuel mixture the system will deliver, thereby regulating engine power and speed. The throttle is connected, usually through a cable or a mechanical linkage of rods and joints.

Fuel is introduced into the air stream through small holes at the narrowest part of the Venturi and at other places where pressure will be lowered when not running on full throttle.

This OEM fuel tank assembly is made out of Plastic and it includes the fuel lines, fuel cap, and fuel filter. It is a common part in gas trimmers that is used to hold the fuel needed for the engine. It is very important to replace the fuel tank if it is cracked or damaged to avoid further damage or serious injuries. Make sure to drain the gas tank before starting a repair.

This is a genuine OEM replacement part, it is sold individually.
The purpose of the 738-04124A Shear Pin is to protect your snowblower.
If the auger gets jammed or clogged, the Shear Pin is designed to snap at a certain point of pressure, so it will not damage any other part of the unit.

This is a genuine OEM replacement part, it is sold individually.
This is the front wheel on the models shown below.
There are two of them on each mower.
The wheel has a ring gear on the inside which is driven by the Right hand and Left hand smaller gear that attaches to the front axle on the transmission assembly.