Mtd 951-05531 Lawn Mower Automatic Choke Carburetor Assembly HY-5X65B

The MTD 951-05531 automatic choke carburetor assembly supports fuel metering and choke operation on applicable lawn mower engines, with symptoms often appearing during starting or engine idle.

This part addresses the following common issues:

• Cold engine has difficulty starting.

• Engine shuts off shortly after startup.

• Engine hesitates during initial operation.

• Automatic choke linkage stays in one position.

• Fuel residue appears near the carburetor.

Cold Start Hesitation

Quick Check: Observe the engine during the first start of the day and note whether it repeatedly hesitates before running.

Fix Suggestion: Examine the automatic choke linkage and carburetor passages for restriction or sticking.

Prevention Tip: Use fresh fuel and keep dirt away from the carburetor intake area.

Startup Stalling

Quick Check: Check whether the engine starts briefly and then shuts down without remaining at idle.

Fix Suggestion: Inspect fuel delivery, carburetor connections, and choke movement for possible obstruction.

Prevention Tip: Periodically inspect the fuel system for residue or loose connections.

Choke Remains Engaged

Quick Check: With the engine stopped and cooled, watch the choke linkage as it moves through its range.

Fix Suggestion: Clear external debris and service the choke mechanism if it does not move freely.

Prevention Tip: Clean around the linkage during regular mower maintenance.

Fuel Seepage Near Carburetor

Quick Check: Examine the area around the carburetor and fuel connection for fresh residue.

Fix Suggestion: Check the fuel-line connection and carburetor mounting area for looseness or damaged sealing surfaces.

Prevention Tip: Assess fuel-system connections after servicing and keep them free from dirt.

Customer Experience: One user described improved cold starting after replacing the choke linkage and checking the fuel connection around the carburetor assembly.