LYCOMING LW11997P50 Seal Crankshaft

( Brand: Lycoming ), ( Manufacturer Part Number: LW11997P50 ), ( Part Type: Seal Crankshaft ), ( Items Included: Seal ), ( Country Of Origin: United States )

Review LYCOMING Seal Crankshaft

The **Lycoming LW11997P50 Seal for Crankshaft** is a precision-engineered, high-performance sealing component meticulously designed to ensure optimal functionality and longevity in Lycoming aircraft engine applications. Crafted from a proprietary blend of high-grade elastomeric materials, this seal is engineered to withstand extreme temperatures, rapid thermal cycling, and the demanding pressures encountered in aviation environments, where reliability is paramount. The seal features a robust, reinforced lip construction that maintains a consistent, low-friction interface with the crankshaft, minimizing wear while preventing oil leakage a critical factor in preserving engine efficiency and preventing costly internal damage. Its unique cross-sectional design incorporates advanced anti-extrusion backing and a self-aligning mechanism, allowing it to accommodate minor shaft misalignments and vibrations without compromising its sealing integrity. Ideal for use in Lycoming s line of fuel-injected and carbureted engines, such as the O-320, O-360, and IO-540 series, this seal is specifically engineered to fit the **LW11997P50 crankshaft journal**, ensuring a perfect interference fit that resists rotation and axial displacement. Constructed with durability in mind, the material composition resists oil degradation, ozone exposure, and environmental contaminants, making it suitable for both short-term and long-term aircraft operations. Whether installed during routine maintenance or as part of a major overhaul, this seal is a vital component for maintaining engine health, reducing friction losses, and extending the operational life of Lycoming powerplants. Its precision manufacturing and adherence to strict aviation standards ensure that it meets or exceeds OEM specifications, providing pilots and mechanics with confidence in its performance under the most demanding flight conditions.

### **Pros and Cons of Buying a Used Lycoming LW11997P50 (Sealed Crankshaft) Engine**

#### **Pros**

1. **Proven Reliability** The Lycoming LIO-360 series (which the LW11997P50 belongs to) has a long history of durability in aviation, particularly in light aircraft like the Cessna 172, 182, and 195. Many engines of this type have exceeded 2,000 hours with proper maintenance.

2. **Sealed Crankshaft Advantage** The sealed crankshaft design reduces oil leaks and contamination, making maintenance slightly easier than older models with open crankshafts. This can lower long-term maintenance costs.

3. **Widely Available Parts & Support** Lycoming engines are among the most supported in general aviation. Spare parts, overhaul services, and technical manuals are readily available from Lycoming, Teledyne Continental, and third-party suppliers.

4. **Good Fuel Efficiency for Its Class** Compared to modern turbocharged engines, the LIO-360 provides decent fuel economy (around 8 10 GPH at cruise) for its power output ( 160 180 HP), making it cost-effective for training and general flying.

5. **Lower Purchase Cost Compared to New Engines** A used LW11997P50 (often found in Cessna 182s) typically costs between **$20,000 $40,000**, depending on condition and hourage, making it a budget-friendly alternative to newer engines like the IO-390 or IO-520.

6. **Proven Overhaul Market** Lycoming engines are routinely overhauled by FAA-certified shops, ensuring that a well-maintained example can have a long service life with proper TBO (Time Between Overhauls) compliance.

7. **Good for Training & Utility Flying** The power-to-weight ratio is well-suited for training aircraft, and its simplicity makes it easier to troubleshoot than more complex modern engines.

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#### **Cons**

1. **Age & Wear Concerns** Most LW11997P50 engines are **30 50 years old**, meaning they may have accumulated significant wear. Critical components like pistons, bearings, and cylinders can degrade over time, requiring careful inspection.

2. **Higher Maintenance Costs Over Time** While parts are available, labor-intensive tasks (such as cylinder overhauls, crankshaft inspections, or magnetos) can be expensive. Some owners report **$5,000 $10,000 in maintenance costs every 500 1,000 hours**.

3. **Potential for Hidden Damage** Without a thorough pre-purchase inspection (PPI), buyers risk inheriting **cracked cylinders, worn crankshafts, or fuel pump failures**, which can lead to costly repairs.

4. **Limited Modern Technology** Unlike newer engines with **FADEC, electronic ignition, or improved fuel injection**, the LIO-360 relies on **mechanical fuel pumps, carburetets (or early fuel injection), and wet sump oil systems**, which can be less efficient and more prone to failure.

5. **Environmental & Emissions Concerns** Older Lycomings do not meet modern **FAA emissions standards** for new aircraft, though they remain legal for existing airframes. Some operators may face restrictions in certain airports or regions.

6. **Depreciation Risk** While Lycomings hold value reasonably well, they depreciate faster than newer engines. If you plan to sell later, a well-maintained example may not retain as much value as a modern IO-520 or PT6.

7. **Fuel & Oil Consumption Variability** Some examples suffer from **oil leaks, carburetor icing, or fuel pump failures**, leading to higher operating costs. A poorly maintained engine may consume **more oil (1 quart per 25 hours) and fuel than expected**.

8. **Limited Warranty Options** Unlike new engines, used Lycomings typically come with **no warranty** unless purchased from a dealer with a limited guarantee. Overhaul warranties (if available) are usually short-term (e.g., 500 hours).

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### **Conclusion & Recommendation**

#### **Who Should Buy a Used LW11997P50?**

- **Budget-conscious buyers** who need a reliable, proven engine for training or general aviation.

- **Owners of older Cessna 182s or 195s** who want to avoid the cost of a full engine replacement.

- **Operators who prioritize simplicity** and are willing to invest in maintenance.

- **Those who can afford a thorough PPI** (including **boroscope inspection, compression checks, and magnetos**) to ensure no major hidden issues.

#### **Who Should Avoid It?**

- **Buyers looking for low-maintenance, high-efficiency engines** modern alternatives (e.g., IO-520, PT6, or even a remanufactured Lycoming) may be better.

- **Operators who cannot afford regular overhauls** Lycomings require **cylinder overhauls every 1,500 2,000 hours**, which can be expensive.

- **Those who want the latest technology** electronic ignition, FADEC, and improved fuel systems are absent in this engine.

- **Buyers who cannot perform or afford a full inspection** many failures (e.g., cracked cylinders, worn crankshafts) are not visible without professional testing.

#### **Final Recommendation**

If you **find a well-documented, low-hourage LW11997P50 (under 1,500 hours) with a clean service history**, it can be a **cost-effective, reliable choice** especially for training or utility flying. However, **budget at least $10,000 $15,000 for a full inspection and any necessary repairs** before purchase.

- A **remanufactured Lycoming IO-360** (if available).

- A **modern IO-520 or PT6 engine** (if budget allows).

- A **well-maintained Cessna 172 with a newer engine** (e.g., IO-360-A1A6).

**Always prioritize a pre-purchase inspection by an FAA-certified mechanic** this is the best way to avoid costly surprises. If the engine checks out, it can be a **solid, economical choice** for the right operator.

Details:

NEW, P/N LW11997P50.

part #: lw11997p50 prices

• $5.00-$50.00

specifications cranshafengin:

• brand: Lycoming
• mpn: Lw11997p50
• part type: Seal Crankshaft
• items included: Seal
• country of origin: United States

shipping cranshafengin:

• cost: $15.46
• type: Calculated
• carrier: UPS
• class: Standard
• transit: 4-11 Days
• service: UPS Ground

payments cranshafengin:

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

seller cranshafengin:

• city: Fort Lauderdale, Florida
• rating: 100.0%
• # reviews: 73

offer cranshafengin:

• options: Ship-to-home
• availability: In Stock
• quantity: 2
• sold: 0
• started: April 6, 2026

returns cranshafengin:

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

general cranshafengin:

• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
• condition: New