CISON L4-205-OHV 20.5cc Gas Powered Inline Four 4-Stroke Water-Cooled Engine Model with 4-1 Exhaust Header

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CISON L4-205-OHV 20.5cc Gas Powered Inline Four 4-Stroke Water-Cooled Engine Model with 4-1 Exhaust Header


🌟 Early Bird Special: CISON L4-205-OHV Gasoline Engine Pre-sale 🌟

🔥 Get 15% OFF — Limited Time Offer! 🔥

Original Price: $999.99
Early Bird Price (15% OFF): $849.99

Hurry! Only 7 Days Left for Early Bird Pricing!
Offer ends on March 11th — After that, the price will return to $1,099.99 with just 10% OFF, making the final price $989.99.

🎁 Exclusive Benefits for Early Birds!

Only 50 Units Available — Be the First to Secure Yours!

  • Priority Access: Get exclusive early access to the CISON V8 Transmission when it launches, plus special discounts on future CISON products!
  • Limited Stock: Only 50 units are available for this pre-sale. Once they’re gone, they’re gone!

🚀 Why Wait? Early Birds Get the Best Deal!

  • Lock in Your Savings: Pre-order today and save $150 with the Early Bird discount!
  • Don’t Miss Out! Only 50 Units Available! This offer is extremely limited — act fast to get yours before they sell out!


Product Comparison: CISON L4-175 vs. CISON L4-205-OHV

Feature CISON L4-175 CISON L4-205-OHV
Displacement 17.5cc 20.5cc (17% increase)
Valve Mechanism OHV (Overhead Valve) OHV (Overhead Valve)
Cylinders Inline 4-cylinder Inline 4-cylinder
Cylinder Diameter 16.7mm 18.5mm
Stroke 19.5mm 19mm (Slightly shorter, more stable performance)
RPM Range 1500 - 8000rpm 1800 - 11500rpm (Higher RPM, better for high performance)
Power Output About 2.5 horsepower (ps) About 3.6 horsepower (ps, 45% increase)
Cooling System Water cooling Water cooling
Starting Mode Electronic starting Electronic starting
Ignition Method CDI Ignition CDI Ignition
Lubrication System Independent lubrication system Improved independent lubrication system
Recommended Fuel 92# gasoline and above 92# gasoline and above
Recommended Oil 2T or 4T engine oil (10W50 recommended) 2T or 4T engine oil (10W50 recommended)
Suitable Models Suitable for 1/10 RC models, light off-road trucks Suitable for 1/8, 1/10 RC models, off-road trucks, tractors, boats, etc.
Product Dimensions 13.5 x 10.24 x 10.5 cm 13.5 x 10.2 x 10.5 cm
Product Weight 1300g 1300g
Package Dimensions 20 x 20 x 20 cm 20 x 20 x 20 cm
Package Weight 2200g 2000g
Recommended Age 14+ years 16+ years
Color Red Blue

Key Upgrades:

  1. Larger Displacement, More Power:
    The L4-205-OHV boasts an upgraded displacement of 20.5cc, a 17% increase over the L4-175, providing a 3.6 horsepower output for enhanced performance.

  2. Higher RPM Range for Better Performance:
    The L4-205-OHV has a higher RPM range of 11500rpm, making it ideal for high-performance applications requiring higher speed.

  3. Efficient Cooling System:
    Both engines feature a water cooling system, but the L4-205-OHV offers more efficient cooling for longer operation and stability.

  4. Enhanced Lubrication System:
    The L4-205-OHV includes an improved independent lubrication system, ensuring better lubrication and reduced friction for smoother operation.

  5. Broader Compatibility:
    The L4-205-OHV is compatible with more types of RC models, including 1/8, 1/10 off-road trucks, tractors, and boats, offering greater flexibility and versatility.

  6. Color Upgrade:
    The L4-175 features a classic red design, full of sporty energy.
    The L4-205-OHV comes with a new blue appearance, giving it a more modern, sleek, and high-tech look.

🎯 Purchase Notes:

  • No Start-up Accessories or Battery Included:
    Both L4-175 and L4-205-OHV do not include start-up accessories, CDI ignition, spark plug, or battery. Customers need to purchase these separately. It is recommended to use a 12V Li battery (not included) for proper starting.

Why Choose the CISON L4-205-OHV?

  • More Power: The 3.6 horsepower delivers significantly more power, suitable for high-performance RC models.
  • Higher RPM Range: With a 11500rpm range, the engine is designed for high-speed applications and intense performance.
  • Improved Lubrication & Cooling: The independent lubrication system and water cooling help the engine perform reliably over extended periods.
  • User-Friendly: Features electronic starting for easy use and compatibility with more RC models, including off-road trucks, boats, and tractors.
  • Enhanced Durability: The improved lubrication and cooling systems increase the engine’s lifespan.
  • Modern Appearance: The sleek blue design of the L4-205-OHV stands out as a futuristic and high-tech option for enthusiasts.


Everything You Need to Know About CISON L4-205-OHV: FAQ

1. What is the lead time for receiving my CISON L4-205-OHV Engine?

Good news! We’ve expedited the process by starting the mold production earlier, so now your engine will ship in mid-March, instead of the usual 45-60 days wait. Once shipped, you’ll receive an email notification with tracking details.

2. Are there any other parts I need to buy separately to get the engine working?

The CISON L4-205-OHV Engine comes with all the necessary components to start. However, due to international shipping restrictions, fuel and batteries are not included. These can be easily purchased locally at hobby shops.

Basic assembly tools like screwdrivers are included. If you prefer advanced tools like an electric screwdriver, you can find them on STIRLINGKIT or any hardware store.

3. How do I start the engine? What parts do I need?

To get your CISON L4-205-OHV Engine started, you will need the following parts (all included in the kit):

  • Gasoline Pipe
  • Oil Pipe
  • Mechanical Start Harness Module
  • Igniter
  • Radiator
  • Cooling Fan
  • Fuel Tank
  • Spark Plug

Fuel and a battery are not included due to international shipping restrictions, but they can be purchased locally. We’ve included a detailed setup guide to walk you through the process step-by-step.

4. Can I use this engine with other models or accessories I’ve purchased before?

Yes, the CISON L4-205-OHV Engine is compatible with the CISON V8 Transmission and CISON Generator. These accessories work great for expanding your RC setup, improving power delivery, and adding more functionality to your model. Additionally, this engine can be used for other custom RC builds like boats, trucks, or even miniature vehicles.

5. What do I do if something is missing or broken?

If any parts are missing or broken, please contact us immediately. We offer free replacement parts for any defective or missing components. For issues with shipping damage, please provide photos of the damage, and we’ll resolve the issue quickly.

6. How long will the engine last, and how do I maintain it?

With proper care, the CISON L4-205-OHV Engine is built to last. To extend its lifespan, follow these maintenance steps:

  • Oil Changes: Change the oil every 10-15 hours of use.
  • Cooling System: Regularly check the radiator and cooling fan to ensure they’re working effectively.
  • Spark Plug: Inspect and clean the spark plug regularly.
  • Fuel System: Keep the fuel system clean to avoid clogging.

Proper maintenance will ensure the engine runs smoothly for years.

7. What kind of warranty do you offer?

The CISON L4-205-OHV Engine comes with a 1-year warranty covering manufacturing defects. If you experience issues related to defective parts, we’ll provide free replacements. Please note that damage caused by improper assembly, misuse, or lack of maintenance is not covered by the warranty.

8. Is there any technical support available if I run into issues?

Yes, our customer service team is available to assist with any technical issues or questions. You can reach us via:

  • Email: service@stirlingkit.com

Our support team is knowledgeable and ready to help you set up your engine, troubleshoot problems, or guide you through upgrades.

9. What do I do if I have trouble connecting the engine or starting it?

We provide a detailed setup manual and connection guide to help you. If you’re having trouble getting the engine started or connected, please review the following:

  • Make sure the fuel system is connected properly.
  • Ensure that all electrical components (like the igniter and starter harness) are in place.
  • Check that the cooling system is properly installed to prevent overheating.

If you’re still having issues, contact our technical support team for personalized assistance.

10. What projects can I build with the CISON L4-205-OHV Engine?

The CISON L4-205-OHV Engine is perfect for various ground-based projects. Here are some ideas where it excels:

  • RC Cars & Trucks: Enhance the performance of your remote-controlled vehicles.
  • Go-Karts: Power a custom go-kart with reliable speed and control.
  • Miniature Generators: Use it for building small-scale power generators.
  • Mechanical Projects: Combine with a gearbox for smooth power transmission in custom machines and equipment.


11. Is there an option to purchase a starter kit or other accessories?

Yes, we offer a range of starter kit s and accessories for the CISON L4-205-OHV Engine on STIRLINGKIT, including premium tools, upgraded exhaust systems, performance parts, and more. However, if you have already purchased a previous version of the engine with its own starter kit, there’s no need to buy the kit again. You can simply browse our website for additional accessories or upgrades that might interest you.

12. What if the engine is out of stock or I miss the pre-sale discount?

We are only producing 50 units of the CISON L4-205-OHV Engine for this pre-sale, and we’re offering an exclusive 15% OFF during the first 7 days. After this period, the price will drop to 10% OFF. Once our initial batch is sold out, you may have to wait for the next production cycle. To guarantee your engine and receive the best price, we recommend placing your order as soon as possible. Don’t miss out!

13. How difficult is the assembly of the CISON L4-205-OHV Engine?

The assembly of the CISON L4-205-OHV Engine is suitable for intermediate to advanced users who have experience with model engines or mechanical assembly. While it’s not a beginner project, the kit comes with clear, step-by-step instructions. If you have previous experience with RC engines or similar projects, you should find the assembly manageable. For those who are new to mechanical assembly, we recommend taking your time and carefully reviewing the manual to ensure proper connections and secure fittings.

14. How long does it take to assemble the engine?

The assembly time typically takes between 4 to 6 hours, depending on your experience. Here’s a general breakdown:

  • Beginner: 6+ hours
  • Intermediate: 4-5 hours
  • Advanced: 3-4 hours

It’s important to take your time and double-check your work for the best results.

15. Is the assembly manual included in the box?

Yes! The CISON L4-205-OHV Engine comes with a printed assembly manual. It provides clear, step-by-step instructions, including detailed diagrams, parts lists, and instructions for operating the engine.

16. Can I track my order?

Yes! Once your order has been dispatched, you will receive a tracking number from Stirlingkit via email so you can track your order’s progress.

17. Can I use the CISON L4-205-OHV Engine in extreme weather conditions?

While the engine is designed for rugged outdoor use, we recommend storing it in a dry, cool area when not in use. When operating in extreme temperatures, ensure that the cooling system is functioning properly to avoid overheating.

18. Where can I buy the necessary fuel and battery?

Due to international shipping restrictions, fuel and battery are not included with your purchase. You can easily find them at your local hobby shop. We recommend using a 12V Li battery and 92# gasoline or higher.

19. Will I receive free shipping with my order?

Yes! All orders of the CISON L4-205-OHV Engine from STIRLINGKIT come with free upgraded EXPRESS shipping.

20. What is the recommended fuel and oil for the engine?

Fuel: The CISON L4-205-OHV Engine requires 92# gasoline or higher.

Oil: We recommend using 2T Engine Oil and 10W50 Engine Oil for optimal performance and engine life.

21. What is the working principle of the CISON L4-205-OHV Engine?

The CISON L4-205-OHV engine works by drawing in a mixture of air and fuel, optimizing it for the best power delivery. The carburetor regulates the air-fuel ratio, and the spark plug ignites the mixture to start the combustion process.

22. What are some important tips for assembling my CISON L4-205-OHV engine as a beginner?

  • Check Your Package: Inspect all parts to ensure everything is included. Contact us if anything is missing.
  • Take Your Time: Follow the instructions carefully to avoid mistakes.
  • Organize Your Tools: Make sure you have everything ready before starting.
  • Test and Double-Check: Check each step after completing it.
  • Trial Run: Test the engine in a controlled environment after assembly.
  • Use the Right Fuel and Oil: Use 92# gasoline and 2T engine oil (10W50 recommended).
  • Ask for Help: Don’t hesitate to contact us if you need assistance.
  • Wear Protective Gear: Always wear safety glasses and gloves during assembly.

By following these tips, you'll have a smoother and more enjoyable assembly process.

23. Can I purchase individual parts or accessories separately?

Yes, after the engine has shipped, we will offer individual parts for sale. If there are any specific components or accessories you’re interested in, feel free to contact us directly via email. We’re happy to assist you in finding the parts you need!

24. Can I convert the engine for use in a remote-controlled car?

Yes, you can! If you'd like to convert the CISON L4-205-OHV Engine for use in an RC car, we offer a compatible clutch for this purpose. Please feel free to reach out to us if you need more details or assistance with the conversion.

Package List of the CISON L4-205-OHV Engine

  • Wooden Packaging Box: Durable and stylish box to keep everything safe during delivery
  • Paper Instruction Manual: A detailed guide for assembly and operation
  • Engine Parts: Either the engine components in parts for assembly or a pre-assembled engine (depending on the option you choose)
  • Basic Tools: Essential tools needed to get started with assembly



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