LYCOMING SL-18661 Set Seals

( Brand: Lycoming ), ( Manufacturer Part Number: SL-18661 ), ( Part Type: Seal ), ( Compatible Model: Lycoming Sl 18661 ), ( Country Of Origin: United States )

Review LYCOMING 18661 Set Of Seals New Parts fits SL

The Lycoming SL-18661 SL 18661 Set Seals are a crucial component for maintaining the performance and longevity of aviation engines manufactured by Lycoming. These seals are specifically designed for the Lycoming IO-360 series engines, which power a wide range of light aircraft.

The SL-18661 Set Seals include several key components that work together to ensure the efficient operation of the engine. The set consists of six individual seals: two crankshaft seals, two camshaft seals, and two oil pump seals. Each seal is meticulously engineered using high-quality materials, including a specialized elastomeric compound for the seal faces and robust metal housings.

The crankshaft seals are responsible for preventing oil leakage between the crankshaft and the engine casing. These seals feature a unique, labyrinthine design that creates multiple sealing surfaces, offering enhanced sealing performance and resistance to wear. The camshaft seals, on the other hand, are designed to seal the interface between the camshaft and the engine block. They utilize a patented dual-lip design to provide an effective barrier against oil leakage, even under high engine RPMs.

The oil pump seals are essential for maintaining the proper oil pressure within the engine. These seals are manufactured with a precision-machined metal housing and a durable elastomeric seal face. They are designed to withstand the high pressures and temperatures generated by the engine's oil pump, ensuring reliable sealing and long-lasting performance.

Installation of the SL-18661 Set Seals is a straightforward process, typically involving the removal of the affected engine components and replacement with the new seals. Proper installation is crucial for the seals to function effectively and efficiently, so it is recommended that the installation be performed by a certified aviation mechanic or a knowledgeable and experienced individual with a solid understanding of engine maintenance procedures.

In summary, the Lycoming SL-18661 SL 18661 Set Seals are an essential investment for aviation engine owners and operators who seek optimal engine performance and extended engine life. These high-quality seals are meticulously engineered to provide effective sealing in the most demanding conditions, ensuring the continued reliable operation of the engine.

Buying Lycoming SL-18661 or SL-18661-SET seals for an aircraft engine involves considering several factors before making a decision. Here are some pros and cons to help you understand the benefits and drawbacks of this purchase.

1. High-quality seals: Lycoming is a well-known and reputable manufacturer of aircraft engines and engine parts, including seals. By purchasing their seals, you can be assured of their quality and reliability.

2. Improved engine performance: Worn or leaking seals can negatively impact engine performance. Replacing them with new ones can help restore the engine's efficiency and power output.

3. Reduced maintenance costs: Continuing to use worn-out seals can lead to more significant engine damage in the future, resulting in more expensive repairs. Replacing them now can save you money in the long run.

4. Enhanced safety: Leaking seals can pose a safety risk, particularly during flight. Replacing them can help prevent potential engine failures and ensure the safety of the aircraft and its occupants.

1. Cost: Replacing engine seals can be an expensive proposition, especially when purchasing them from a reputable manufacturer like Lycoming.

2. Time-consuming: Installing new seals can be a time-consuming process, requiring the engine to be disassembled and reassembled.

3. Availability: Depending on the availability of the specific seals you need, there may be a wait time for delivery, which can delay your maintenance schedule.

The decision to buy Lycoming SL-18661 or SL-18661-SET seals depends on your priorities and circumstances. If you value the reliability and quality of the seals and are willing to invest in the upkeep of your aircraft engine, then purchasing them from a reputable manufacturer like Lycoming is a sound choice. However, if cost is a significant concern, you may want to explore other options or consider reusing your existing seals if they are still in good condition. Ultimately, regular engine maintenance is essential for the safety and efficiency of your aircraft, and replacing worn-out seals is an essential part of that process.

My recommendation would be to prioritize the quality and reliability of the seals over cost considerations. Investing in high-quality seals from a reputable manufacturer like Lycoming can help ensure the long-term health and performance of your aircraft engine. Additionally, be sure to follow the manufacturer's recommended maintenance schedule to help prevent the need for costly repairs in the future.

Details:

THESE ARE A SET OF 4 LYCOMING SEALS.

part #: sl18661 prices

• $7.00-$18.50

specifications aviationpar:

• for models: Sl
• brand: Lycoming
• mpn: Sl-18661
• part type: Seal
• compatible model: Lycoming Sl 18661
• country of origin: United States

general aviationpar:

• Parts Accessories > Aviation Parts Accessories > Parts
• condition: New

returns aviationpar:

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

payments aviationpar:

• credit card: Visa
• other
• wallet: Apple-pay

seller aviationpar:

• # reviews: 4124
• rating: 99.4%
• city: Bell, Florida

shipping aviationpar:

• service: Economy
• type: Fixed
• cost: $0.00
• class: Economy
• transit: 6-13 Days

offer aviationpar:

• started: February 8, 2026
• quantity: 2
• options: Ship-to-home
• availability: In Stock
• sold: 0

Lycoming SL-18661 Is Similar To:

• Alvo Model 1976-1978 Engine Parts Catalog Rg 177 Manual Lycoming Aircraft Cessna (21.4% similar) Very good condition. There is also an avo Lycoming engine parts catalog in the last part of this manual. Buyer pays shipping if in the u Cessna model 177 rag aircraft parts catalog manual in a 3 ring binder...(March 11th, 2015)
• 37a19773-382 Lycoming Alternator Belt New (39.1% similar) Any question, please. Lycoming alternator belt, 37A19773-382NEW condition. Item to be determined by buyer, airworthy and comply with all applicable Farsi when installing part on aircraft. Free shipping...(December 14th, 2018)
• 60828 Lycoming New Series Piston Pin Plug Ends Pn (30% similar) My brother for many years flew Cole pales old roebuck aerodrome. In honor of my dad, I'm continuing our aviation heritage. My father continued the passion for flying and owned several aircraft over years. It was considered the grand daddy of all flying air shows. In 1922, Ivan gates organized the ...(March 18th, 2019)
• 6494-set Lycoming Narrow Deck Cylinder Base Wrench Set (28.6% similar) Part: 6494-SET prices...(November 17th, 2018)
• 71134 Lycoming Cylinder Base Nut Part New Old Stock (41.2% similar) New old stock...(September 4th, 2018)
• 71646 Lycoming New Lock Plate Spacer Has Bolt Holes (33.3% similar) New Lycoming lock plate, spacer P/N 71646, has bolt holes...(December 30th, 2018)
• 73806 Avco Lycoming New Push Rods (35.7% similar) Still and package price is for both total of 8 push rods. Lycoming O-235 push rods L2C 73806. New old stock...(June 26th, 2019)
• 77611 Lycoming No Blow Exhaust Gaskets Set Of (39.6% similar) New from aircraft spruce set of 4 no blow exhaust gaskets 77611...(July 14th, 2018)
• Io-540 Lycoming Avco Parts Catalog Aircraft (31.9% similar) Avo Lycoming IO-540 parts catalog...(January 7th, 2017)
• 367755 N A Lycoming Gasket Aviation Part New Old Stock (34.3% similar) The shipping price quoted is for the continental USA only. Most boxes have been opened for inspection and photos. If items are listed as new they may not come with original packaging. For every 50 insured, in 50 increments...(July 31st, 2016)
• 901045k12 N A Qty 75 Lycoming Lockwasher New Old Stock (32.4% similar) The shipping price quoted is for the continental USA only. For every 50 insured, in 50 increments. Most boxes have been opened for inspection and photos. If items are listed as new they may not come with original packaging...(June 18th, 2016)