Walbro 30-977-1 Throttle Shaft Assembly

Product Description

The WALBRO 30-977-1 is a throttle shaft assembly designed as a carburetor internal component for small engine applications. The throttle shaft controls airflow through the carburetor bore by rotating to open and close the throttle plate, directly governing engine speed and response. This part is a precision-fit OEM-style replacement intended for service technicians and small engine mechanics performing carburetor rebuilds or addressing throttle linkage failures. Worn or bent throttle shafts cause air leaks, erratic idle, and loss of throttle response, making this a common service item in field carburetor repair.

The 30-977-1 throttle shaft assembly is suited for use in Walbro carburetors found in lawn and garden power equipment, including handheld and walk-behind applications. It is typically installed during a full carburetor overhaul or as a targeted repair when the shaft shows visible wear, scoring, or excessive play in the carburetor body bore. Small engine technicians and outdoor power equipment (OPE) service dealers are the primary installers of this component.

Key Features

• OEM Walbro part for precise dimensional fit within compatible carburetor bodies
• Restores proper throttle plate actuation and engine speed control
• Addresses air leaks caused by worn shaft-to-bore clearance
• Suitable for carburetor rebuild and targeted throttle linkage repair
• Designed for lawn and garden small engine carburetor service

Compatibility

Designed as an OEM-style replacement throttle shaft assembly for Walbro carburetors used in lawn and garden small engine equipment. Consult Walbro parts documentation or a cross-reference guide to confirm fitment for a specific carburetor model number before ordering.

Installation Notes

Installation should be performed by a qualified small engine technician familiar with carburetor disassembly and reassembly procedures. Shut down the engine completely and allow it to cool before beginning any carburetor service work. Handle the throttle shaft carefully to avoid bending, and inspect the carburetor bore for wear before installing the replacement shaft. Refer to the applicable Walbro service manual for disassembly sequence and reassembly guidance.

Technical Specifications

• Component Type: Throttle Shaft Assembly
• Application: Lawn and Garden Small Engine Carburetor

Standard Information

• Brand: WALBRO
• Manufacturer Part Number: 30-977-1