MTD Lawn & Garden Equipment Engine Heater Box 951-11304

Basic information

• Part name: Lawn & garden equipment engine heater box
• Manufacturer: MTD
• Category: Lawn & garden equipment engine part
• Primary function: Helps warm incoming air to support smoother engine operation in cold conditions

Installation & compatibility

• Compatible models: Fits MTD and Craftsman; confirm compatibility using your models parts diagrams
• Installation difficulty: Medium; requires removing intake components and securing the heater box
• Tools required: Screwdriver, socket wrench

Additional information

This engine heater box mounts along the air intake path and helps raise the temperature of incoming air before it enters the engine. Part number 951-11304 supports more consistent combustion during cold starts and cool-weather operation.

If the heater box is cracked, loose, or not functioning correctly, the engine may be hard to start in cold weather, run rough during warm-up, or stall shortly after starting. Reduced airflow control or visible damage to the housing can also point to a problem.

Disconnect the spark plug wire before starting the repair to prevent accidental engine startup. Intake components may have sharp edges, so handle the heater box carefully during removal and installation, wearing work gloves if needed.

Lawn & garden equipment engine heater box 951-11304 replaces part number 751-11304.