STIHL 4180-350-0425-A Km Fuel Tank 90R 91R

( Brand: Stihl ), ( Manufacturer Part Number: 4180-350-0425-A ), ( Part Type: Fuel Tank ), ( Country Of Origin: United States ), ( Manufacturer Warranty: Unspecified Length ), ( Storage Location: D6 Ont2-n Buk 9 )

Review STIHL Km Fuel Tank Assembly fits 1990–1991

The **Stihl KM 90/90R/91/91R 4180-350-0425-A** is a premium, high-performance chainsaw designed for both professional landscapers and serious DIY enthusiasts who demand reliability, efficiency, and cutting-edge technology in their outdoor power equipment. Engineered by Stihl, a brand synonymous with innovation and durability, this model features a **25.4 cc (1.55 cu in) two-stroke air-cooled engine** paired with a **90 mm bar and 0.350" (9.0 mm) pitch chain**, making it ideal for medium to heavy-duty tasks such as pruning, felling small trees, and clearing brush. The **KM series** (Kickstart Model) is equipped with Stihl s legendary **EasyStart** system, which simplifies the kickstart process with a smooth, low-effort pull, reducing operator fatigue during prolonged use. This chainsaw also incorporates **Stihl s patented Anti-Vibration System (AVT)**, a sophisticated design that minimizes operator fatigue by isolating up to **70% of vibration** at the handle, ensuring prolonged comfort even during extended cutting sessions.

The **4180-350-0425-A** model stands out with its **ergonomic, two-handled design**, which enhances control and precision, particularly when working with larger branches or in tight spaces. The **front handle** is contoured for a natural grip, while the **rear handle** features Stihl s **QuickStop** brake system, an advanced safety mechanism that instantly halts the chain upon release, preventing accidental injury. Complementing this is the **inertia-activated chain brake**, which engages automatically when the saw is kicked back or dropped, further ensuring operator safety. The **fuel tank capacity** of **0.425 liters (approximately 14.5 oz)** provides a balanced fuel-to-power ratio, allowing for extended runtime without frequent refueling interruptions, while the **low-maintenance design** reduces downtime for routine upkeep.

Under the hood, the **90 mm bar** is paired with a **0.350" pitch chain**, offering a versatile cutting range suitable for both softwoods and hardwoods, as well as general landscaping tasks. The **automatic oiler** ensures consistent lubrication of the chain, prolonging its lifespan and maintaining optimal cutting performance, while the **low-friction design** of the saw s components minimizes wear and tear, contributing to long-term reliability. The **KM series** also benefits from Stihl s **Stihl PowerMix fuel system**, which combines high-quality oil and gasoline for cleaner combustion, reduced emissions, and improved engine longevity. For added convenience, the saw includes a **carrying handle** and **tool-free chain tensioning**, allowing for quick adjustments without the need for specialized tools.

Whether tackling professional-grade tree trimming, clearing overgrown vegetation, or handling routine yard maintenance, the **Stihl 4180-350-0425-A KM 90/90R/91/91R** delivers a harmonious blend of power, precision, and user-friendly features. Its robust construction, advanced safety systems, and efficient performance make it a standout choice for those who prioritize quality and dependability in their outdoor power tools. With Stihl s reputation for engineering excellence, this chainsaw is not just a tool it s a testament to German precision and the relentless pursuit of superior craftsmanship in the world of power equipment.

### **Pros and Cons of Buying a Used Stihl MS 4180-350 (KM 90/90R/91/91R) with a Fuel Tank**

#### **Pros**

1. **Reliable Engine and Brand Reputation**

Stihl is a well-established brand known for durable, high-performance chainsaws. The MS 4180 series is particularly robust, designed for heavy-duty cutting tasks. The 350cc engine provides strong power output, making it suitable for professional and heavy-duty residential use.

2. **Low Maintenance Requirements**

Stihl engines are engineered for longevity with minimal maintenance needs compared to some competitors. The two-stroke design (if properly mixed with oil) reduces wear on critical components. The fuel tank (if included) adds convenience for extended use without frequent refueling.

3. **Versatility and Performance**

The 4180 is equipped with a **24-inch bar** (standard for this model), which is ideal for cutting large logs, firewood, or thick branches. The **90/90R/91/91R** designations refer to the bar length and chain pitch, ensuring compatibility with a wide range of cutting applications. The **350cc engine** delivers consistent power, reducing stalling during demanding tasks.

4. **Resale Value and Availability of Parts**

Stihl chainsaws hold their value well in the used market. Spare parts, such as chains, bars, spark plugs, and air filters, are widely available, making repairs and replacements straightforward.

5. **Ergonomic Design**

The MS 4180 features a **comfortable handle grip** and a **low-vibration system**, reducing operator fatigue during prolonged use. The **inertia brake** enhances safety by quickly stopping the chain when the bar hits an obstacle.

6. **Fuel Tank Convenience**

The inclusion of a **fuel tank** (likely a standard 0.5L or similar capacity) means you won t need to refuel as frequently during extended cutting sessions, which is useful for large-scale projects.

7. **Proven Durability at This Mileage**

A chainsaw with **90,000 km (or 56,000 miles)** is still relatively young for a Stihl, especially if it has been well-maintained. Two-stroke engines in chainsaws typically last **150,000 200,000 km** with proper care, so this unit has significant remaining life.

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#### **Cons**

1. **Age and Wear Considerations**

- **Wear on the piston, cylinder, and crankshaft** may be more advanced than in a zero-mileage model. A pre-purchase inspection (especially a **compression test**) is critical to assess engine health.

- **Chain and bar wear** may be more pronounced, requiring replacement sooner than in a new saw.

- **Seals and gaskets** (e.g., crankcase, carburetor) may need replacement if the saw has not been properly maintained.

2. **Maintenance History Unknown**

The biggest risk with a used chainsaw is **lack of maintenance records**. If the previous owner neglected oil changes, chain sharpening, or fuel system cleaning, the engine could be in poor condition. Key areas to check:

- **Carburetor clogging** (common in older saws due to fuel degradation).

- **Chain tension and sharpness** (a dull or loose chain increases strain on the engine).

- **Spark plug condition** (a fouled plug indicates poor combustion).

- **Air filter cleanliness** (a dirty filter restricts airflow and reduces performance).

3. **Potential for Hidden Damage**

- **Bar or guide chain cracks** (common in older saws due to impact stress).

- **Clutch wear** (if the saw has been used aggressively, the clutch may need replacement).

- **Fuel system leaks** (if the tank or lines are cracked, it could lead to fuel waste or starting issues).

4. **Fuel Mixing and Storage Issues**

- If the saw has been **stored with old fuel** (especially if it contained ethanol blends), the carburetor may be clogged.

- Two-stroke fuel **degrades in 30 days**, so if the previous owner didn t drain it properly, the engine could suffer.

5. **Noise and Vibration**

While Stihl saws are quieter than some competitors, a used model may have **increased vibration** if components are worn. This can lead to operator discomfort over time.

6. **Cost of Repairs vs. Replacement**

If the engine is **past its prime** (e.g., excessive piston wear, cracked crankcase), repairs could cost **$200 $400**, which may be closer to the price of a **new or lightly used Stihl MS 261 or MS 362**. Always weigh repair costs against the saw s remaining value.

7. **Safety Concerns**

- A **loose chain** or **damaged bar** increases the risk of kickback.

- **Worn clutch components** can fail mid-cut, leading to dangerous situations.

- **Faulty inertia brake** (if not functioning) reduces safety.

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### **Conclusion**

The engine is in **good condition** (proven via compression test, smooth startup, no excessive smoke).

The **chain, bar, and clutch** are **recently replaced or in excellent shape**.

The **fuel system is clean** (no carburetor issues, fresh fuel mix).

The **previous owner provided maintenance records** (or you can verify them).

You **inspect it thoroughly** (or have a professional do so) before purchase.

The **engine runs rough, misfires, or has low compression**, it may require **expensive repairs**.

The **chain or bar is severely worn**, reducing cutting efficiency.

The **seller cannot provide maintenance history**, the risk of hidden issues increases.

You **don t have experience with chainsaws**, a used model may be riskier than a new or lightly used one.

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### **Recommendation**

- **Proceed with caution.** Get a **pre-purchase inspection** (especially a **compression test**) to ensure the engine is healthy.

- **Negotiate the price** based on the inspection findings (e.g., if the chain needs replacement, deduct the cost).

- **Replace the chain, bar, and spark plug** immediately if they re worn.

- **Clean or replace the air filter and carburetor** if necessary.

- **Consider a warranty or return policy** if buying from a dealer.

- **Avoid used models** unless you re **absolutely certain** of their condition.

- **Consider a new or lightly used Stihl MS 261 or MS 362** (smaller, easier to handle, often more reliable for occasional use).

- **Rent a chainsaw** for one-time projects instead of buying used.

- **Set a maximum budget** (e.g., **$600 $800** for a used MS 4180, accounting for potential repairs).

- **Test-run the saw** (if possible) to check for **smooth operation, no excessive smoke, and proper chain tension**.

- **Ask for service records** if the owner can t provide them, **walk away**.

- **Buy from a reputable dealer or private seller with a good reputation** (avoid shady online listings with no photos or details).

The **Stihl MS 4180-350 at 90,000 km can be a great buy if thoroughly inspected and maintained**, offering **strong power and durability** for the price. However, **the risk of hidden engine wear makes it a gamble unless you re confident in its condition**. If you re willing to **invest time in inspection and potential repairs**, it can be a **cost-effective heavy-duty saw**. For most casual users, a **new or lightly used model** may be the safer choice.

Details:

Spotlight: A Day Inside . The image to watch on YouTube. 2004 2010 GRAVELY Aries Pro-Master 252Z Hex Wrapped V-Belt 07 2004 33 OEM. Fits: STIHL KM 90 90R 91 91R Fuel Tank Assembly -A.

Fits Stihl KM 90, 90R, 91, and 91R Combinations. Harley Davidson Armchair Exhaust Engine Washer OEM 6109P.

part #: 41803500425 prices

• $45.99-$64.99

specifications fuetanintak:

• for years: 1990-1991
• brand: Stihl
• mpn: 4180-350-0425-a
• part type: Fuel Tank
• country of origin: United States
• manufacturer warranty: Unspecified Length
• storage location: D6 Ont2-n Buk 9

shipping fuetanintak:

• transit: 4-7 Days
• carrier: FedEx, USPS
• service: FedEx Ground / FedEx Home Delivery, USPS Priority Mail, FedEx 2Day, Overnight
• class: Standard, Expedited, One-day
• cost: $0.00
• type: Fixed

general fuetanintak:

• ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Fuel Tanks
• condition: New other see details

seller fuetanintak:

• # reviews: 208803
• city: Odessa, Florida
• rating: 99.3%

offer fuetanintak:

• started: February 6, 2026
• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home

payments fuetanintak:

• wallet: Google-pay
• other
• credit card: Discover

returns fuetanintak:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

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