138-504R38250658 (1988) MTD Lawn Tractor - Overview

Sourced directly from the original manufacturer, this Bell Washer is made of gold-colored metal and is sold individually, not as part of a kit or assembly. It is used to provide spacing between various part assemblies along a shaft. If you hear a strange noise coming from the shaft area, or you notice the Washer is visibly worn or damag...Read moreed, it will need to be replaced. Refer to your owners manual to determine the exact location of this part. Customers rate the difficulty of this repair as Medium.

This Washer-Lock 5/16 is a silver, metal part that is sold individually and comes direct from the manufacturer. With a 5/16 Inch Interior Diameter and 1/2 Inch Outside Diameter, it is used to prevent the nut from backing off and becoming loose on the pulley shaft, and is attached to the drive belt pulley assembly. You will know if you nee...Read mored this because your owners manual will specify it, or the model number of your machine will correspond with this part. If the part is broken due to fatigue, the shafts will free spin when they should be locked together, and must be replaced.

The Throttle Control Box is an assembly containing the housing, trigger and hardware. It is black, plastic, rated as easy to install and requires a socket or wrench set. This kit controls the speed of the engine, and if broken you will lose control of the engine. If broken, the part should be replaced.

This OEM 5 Pin ignition Switch is a silver, steel, individually sold part. It can be installed using a wrench and screwdriver, and has been rated as Easy to install. The part attaches to the dashboard, and is used to start and shut off the engine. If it is broken (likely due to fatigue), you will no longer be able to start or stop your ...Read moreengine and the part must be replaced. Refer to your owners manual or model number to ensure you are purchasing the correct part.

This pair of keys is supplied by the equipment manufacturer for use in lawn and outdoor power equipment. The key is made of metal and designed to prevent unauthorized use or accidental starting of the equipment. It is fitted into the ignition switch, found near the operator seat or control panel. If the key is lost, damaged, corroded or w...Read moreorn down, you will not be able to engage and start the engine. These keys come in a set of two.

This is a genuine item that is supplied by the original equipment manufacturer for use with MTD and Ryobi lawn and garden equipment. It is a standard hardware which has multiple applications, please make sure to refer to the diagrams of your model for the correct location and application of this item. Keep in mind it is made of durable metal and is sold individually.

This manufacturer-certified Hex Bolt, measuring 5/16-18 x .75 inch, is a gold, metal, individually sold bolt. It can be installed using a wrench or socket and torque wrench, by tightening to manufacturer specifications. If damaged (likely due to fatigue) the threads will be stripped, or the ends rounded off. If broken or missing, it sho...Read moreuld be replaced. Refer to your owners manual or model number to ensure you are purchasing the correct part.

This OEM Hex Nut 5/16-24 is a silver, metal nut. This certified part is sold individually. It can be applied with a Wrench or Socket and Torque Wrench to the bracket on the rear of the auger house to secure a bracket to the back of the auger housing. Simply torque to the manufacturer specifications. Refer to your owners manual to find o...Read moreut if this is the part you need. Over time the part may be damaged by fatigue and will come loose due to damaged threads, at which time it should be replaced.

This item is available as an individual replacement part. The choke control attaches to the throttle box. During replacement, it may require a set of pliers to help install this part correctly. It is made of metal and plastic and will require replacing if it breaks. This genuine item is supplied by the original equipment manufacturer for ...Read moreuse with lawn tractors made by Ryobi, MTD, Yard Machines, Bolens, Yard Man, Troy-Bilt, and Cub Cadet.

This is an original replacement part sourced directly from the manufacturer. The solenoid is commonly found in MTD lawn tractors. This is a complete solenoid assembly. When the ignition key is turned, the solenoid completes the circuit from the battery to start the engine. This product is sold individually.