Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
RJX Mark4 V2 9inch 387mm Carbon Fiber Plain Matte Frame KitDesigned for Long Distance Flights: MARK4 V2 9 inch 387mm FPV freestyle frame is designed for long distance flights, offering a superior flying experience for drone enthusiasts. Also check out all our Long Range Frames Collection. Features: Lightweight but Sturdy: The racing drone frame is made from 3K carbon fiber material, ensuring that the drone is lightweight yet incredibly sturdy, providing a resilient and enduring frame. 6. 0mm Thick Arms for
Designed for Long Distance Flights: MARK4 V2 9 inch 387mm FPV freestyle frame is designed for long distance flights, offering a superior flying experience for drone enthusiasts.
Also check out all our Long Range Frames Collection.
Features:
- Lightweight but Sturdy: The racing drone frame is made from 3K carbon fiber material, ensuring that the drone is lightweight yet incredibly sturdy, providing a resilient and enduring frame.
- 6.0mm Thick Arms for Stability: Featuring 6.0mm thick arms, our drone frame offers greater stability. The sturdy arms are not prone to breaking during , ensuring smooth and consistent performance.
- Wind Resistant: With thick frame arms and a compact design, RC drone frame considerably reduces the total weight and also has a lower wind resistant coefficient.
- Easy to Assemble: The drone frame is easy to assemble making it suitable for both beginners and advanced users. Quadcopter freestyle frame kit offers a straightforward assembly process.
Specifications:
- Wheelbase: 387mm
- Size: 250mm*295mm
- Camera mount size: 19*19mm
- Image transmission system installation hole spacing: 20*20mm & 30.5*30.5mm
- Flight control installation hole spacing: 30.5*30.5mm
- Inner space height: 35mm
- Motor installation hole position: 16*16mm & 19*19mm
- Net weight：202.5g
Package Includes:
- top plate*1 (2.0mm)
- mid plate*1 (3.0mm)
- arm*4 (6mm)
- arm bracer*2（2.0mm）
- stiffening plate*2(2.0mm)
- cam plate*2 (2.5mm)
- bottom plate*1 (3.0mm)
- anti-slip silicone pad*1（2mm）
- M3*35*D5 standoffs*8
- M3*6 screws* 8
- M3*10 screws*4
- M3*12 screws*8
- M3*16 screws*8
- M3*25 screws*4
- M3 Nut *4
- Battery Straps *2
- sponge damping pads*4
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 2073 reviews
Sort
Product Reviews
★★★★★ 5
If pump doesn't seem to work
Size: For 85-300 HP, Size: For 85-300 HP
Hi....I apologize it took me a while to get back to you with my results. Here is what I discovered about the pump and will also apply to some of the other comments I read in the reviews with people not getting the pump to work:
1.) I removed the pump to check the proper direction of the impeller and it was correct as can be seen in the photo.
2.) I built a pump shaft attachement so that I could operate the pump with a power drill.
3.) I attached the water muff to the unit and tried to pump water.....it wouldn't do so. What I did see however was that even at high hose discharge and small leakage at the muff I could not fill the water cavity in the housing.
4.) I installed a strap around the muff and tightened it very tight and THEN at high hose pressure I was able to get the cavity to fill with water.
5.) At that point I activated the drill and was able to get the pump to actually pump water. I then removed the pump housing and removed the O-Ring that resides on top of the impeller, reassembled and it would not pump water. Since the O-Ring sits higher than the original does I wanted to make sure that it was necessary to have it in the pump.
6.) I reassembled the engine and kept the tight strap on the bottom and finally it pumped water into the engine.
My conclusion that you can reply to other buyers if they have a problem:
Do NOT underestimate 2 things....1.)the lack of ability of the pump to draw water up AND 2.)the fact that if the muff leaks it will NOT fill the cavity when common sense says it should. This was a 120hp Johnson. The engine bottom must be immersed fully or the muff must be very tight on the lower unit for the pump to function.
Please feel free to post this if you wish.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 12, 2024
★★★★★ 5
Exelente
Size: For 85-300 HP
Exelente
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
★★★★★ 5
Good as new
Size: Package Dimensions 6.02 x 4.02 x 2.05 inches
Fitment was great and works as it should. Good quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2025
★★★★★ 3
Incorrect motor listed. Far smaller impeller than what's in the 6 horse johnson.
Size: For 5.5HP 6HP 7.5HP
It seems to be of good quality. However it does not fit a 6 horse johnson as it states. Therefore it will not pump water or function for my purposes. It was a waste of money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 15, 2025
★★★★★ 5
Good product
Worked for what I needed. Fit great and easy to install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026