Products Description
MS170 Fuel Tank Cap Gasket – Direct Replacement O-Ring
Fuel-Resistant Seal for STIHL MS170, MS180 & Compatible Models
This gasket (O-ring) is the critical sealing component for the fuel tank cap on STIHL MS170, MS180, 017, and 018 chainsaws . The O-ring prevents fuel leaks and vapour escape by maintaining a tight seal between the cap and the tank filler neck. Over time, exposure to fuel and ethanol blends causes the rubber to harden, swell, or crack, leading to leaks and potential safety hazards. This direct-fit replacement restores proper sealing and prevents fuel loss .
Technical Profiles & Materials
Fuel-Resistant Material – Manufactured from durable rubber designed to withstand petrol, chain oil, and the effects of ethanol-blended fuels, ensuring long-lasting performance.
Precision 7x1.5mm Specification – Sized at 7mm x 1.5mm to provide a secure seal for the cap on MS170, MS180, 017, and 018 models . Replaces the sealing gasket on the fuel filler cap assembly (OEM 1130 350 0500) .
Leak Prevention – Maintains an airtight seal on the fuel tank to prevent leaks, vapour escape, and contamination during cutting, transport, and storage .
Quick, Tool-Free Installation – Simple drop-in replacement; hand-tighten the cap for normal use after installation .
Wide Model Compatibility – Fits a broad range of STIHL models including MS170, MS180, 017, 018, 019T, MS190T, MS210, MS231, MS251, MS271, MS291, MS362, MS461, MS500i, FS120, and various other professional saws .
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Size | 7mm x 1.5mm |
| 2 | Material | Fuel-resistant rubber |
| 3 | Compatible Models | MS170, MS170C, MS180, MS180C, 017, 018, 019T, MS190T, MS191T, MS210, MS231, MS251, MS261, MS271, MS291, MS362, MS461, MS500i |
| 4 | OEM Cap Assembly | 1130 350 0500 |
| 5 | Replaces OEM | 1130-350-0500, 11303500500 |
| 6 | Installation | Tool-free, hand-tighten |
| 7 | Unit of Sale | 1 piece |
Products Application
Chainsaw Fuel Tank Maintenance
Direct replacement when the cap seal fails to prevent leaks, or when the existing O-ring shows signs of hardening, cracking, or swelling. Prevents fuel loss during operation and reduces vapour emissions when the saw is stored.
Preventative Maintenance
Replacing the O-ring on older caps as a proactive measure prevents fuel leaks caused by ethanol-related rubber degradation. This simple fix can prevent the need for a full cap replacement and is recommended when servicing the fuel system .
Workshop Repairs
For servicing STIHL MS170, MS180, and compatible models. The O-ring is a cost-effective solution for a common problem, eliminating the need to replace the complete cap assembly .
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this gasket fits my MS170 fuel cap?
A:Check your chainsaw model number on the housing. This O-ring is compatible with STIHL MS170, MS180, 017, 018, and models including MS210, MS231, MS251, MS271, MS291, MS362, MS461, and MS500i . It is the sealing gasket for the cap assembly (OEM 1130 350 0500) .
Q: What are the symptoms of a worn fuel cap O-ring?
A: Common symptoms include fuel leaks around the cap area, the smell of petrol vapours, a cap that feels loose or does not tighten securely, and visible cracking, hardening, or swelling of the rubber seal .
Q: Is this gasket the same for both the fuel and oil caps?
A: This gasket is designed for fuel tank caps. While similar caps may be used for oil tanks on some models, it is recommended to check your specific model's requirements. Complete cap replacement kits are available that include both fuel and oil caps for convenience .
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