Description
Overview:
The Piston Stopper – Genuine Husqvarna Part (OEM No. 503 84 40-01) – is a workshop tool designed to lock the piston in place through the spark plug hole so you can safely remove or refit components like the clutch or flywheel on two‑stroke engines. Made from a tough, non‑marring polymer, it supports routine servicing without scuffing the piston crown or damaging ports. This genuine Husqvarna tool is suitable for a wide range of Husqvarna handheld machines, including chainsaws and brushcutters, as well as some trimmers, hedge trimmers and leaf blowers that use a conventional spark plug. It is a simple, reusable and reliable aid for home users and professional technicians who want controlled, slip‑free engine locking during maintenance tasks.
Key Features:
- Genuine Husqvarna OEM tool for dependable fit and function
- Non‑marring polymer tip helps protect the piston and cylinder
- Screws into the spark plug hole for quick, positive piston locking
- Aids safe removal and installation of clutches, flywheels and drive components
- Suitable for many Husqvarna two‑stroke engines used in chainsaws, trimmers and blowers
- Reusable and durable construction for regular workshop use
- Compact design for easy storage in toolboxes or service kits
- Helps apply and resist torque without reliance on improvised methods (e.g. starter rope)
- Clear, simple operation: hand‑tighten only and rotate the engine gently to seat against the stop
- Genuine part helps maintain correct tolerances and reduces risk of damage compared with non‑genuine alternatives
Typical Applications:
Used during engine servicing to hold the piston while loosening or tightening the clutch, flywheel, rim sprocket, or related drive parts. Ideal for routine maintenance such as replacing a clutch, inspecting the oil pump drive, or checking ignition components. Suitable for tradespeople, grounds teams and DIY users working on Husqvarna two‑stroke handheld machinery.
Also known as:
Piston stop tool, spark plug hole piston stop, cylinder stop, engine locking tool, clutch removal lock, flywheel locking tool for two‑stroke engines.
Alternate Part Numbers:
503 84 40-01, 503844001
Product Specifications
| L&S Part No. | 503 84 40 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 503844001 |
| Unit of Sale | 1 |
| Fits Brands | Husqvarna |
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