Homelite UP00403 TBO Solenoid Assembly – Genuine OEM Replacement Solenoid

Part Number: UP00403
Category: String Trimmer & Small Engine Parts
Type: TBO Solenoid Assembly – Genuine OEM Replacement Solenoid

The Homelite UP00403 TBO Solenoid Assembly is a genuine OEM replacement engine component designed for select Homelite Touchstart string trimmers. Installed within the engine's starting system, the solenoid assembly works as part of the Touchstart/start-assist mechanism used to help operate the engine starting system. Homelite factory parts documentation identifies UP00403 specifically as the Solenoid Assembly in the engine internal assembly of the UT-20683 Touchstart String Trimmer.

Product Specifications

• Part Number: UP00403
• Manufacturer: Homelite
• Product Type: Solenoid Assembly
• OEM Description: Solenoid Assy-TBO / Solenoid Assembly
• Function: Operates Within the Engine Starting / Start-Assist System
• System: Touchstart Starting System / Engine Assembly
• Application: Gas-Powered String Trimmer
• Compatible Brand: Homelite
• Compatible Model: UT-20683
• Engine: 25cc
• OEM Status: Genuine Homelite OEM Part
• Condition: New
• Quantity Used: 1 per applicable assembly

Features & Benefits

• Genuine Homelite OEM replacement solenoid assembly
• Factory-designated Solenoid Assy-TBO
• Designed for compatible Homelite Touchstart equipment
• Functions within the engine starting and start-assist system
• Helps restore proper operation of the original starting mechanism
• Ideal replacement for failed, damaged, or malfunctioning solenoids
• Manufactured for factory-correct fit and configuration
• Integrates with the original engine and Touchstart components
• Direct replacement for equipment requiring part number UP00403

Applications

• Homelite UT-20683 Touchstart String Trimmer
• Homelite 25cc Touchstart engine assemblies
• Touchstart starting systems
• Start-assist assemblies
• String trimmer engine repair and restoration
• OEM replacement for equipment requiring part number UP00403

Important Notes

• Verify compatibility with your specific Homelite model and UT number before ordering.
• Designed as a genuine OEM TBO Solenoid Assembly for equipment requiring part number UP00403. OEM suppliers specifically catalog the component as “SOLENOID ASSY-TBO.”
• Homelite factory documentation for the UT-20683 Touchstart String Trimmer identifies UP00403 as item 16, Solenoid Assembly, with one required per applicable engine assembly.
• The solenoid is located within the Engine Internal section of the UT-20683 parts breakdown alongside the PS00139 Lever Arm, 69599 Retaining Ring, A07138 Crankcase Cover, and related engine hardware.
• The UT-20683 also uses a separate A07927A Start Assist Kit-TBO, along with related starting-system components. These components are separate from the UP00403 solenoid assembly.
• This listing is for the solenoid assembly only unless otherwise specified. Lever arms, retaining rings, start-assist kits, covers, switches, wiring, fasteners, batteries, and other starting-system components are sold separately.
• Inspect the associated wiring, lever mechanism, retaining hardware, start-assist components, and mounting points during installation. Replace worn, damaged, loose, or corroded components as needed to help restore dependable starting-system operation.