Warm Tips: A. The red and silver engines are in stock, and are available in the US warehouse, shop now, ship now! B. These 2 are the same engine but with 2 different logos on the cover, one is OTTO MOTOR which is off production now, one is SEMTO ENGINE. Orders after 12th, Dec, 2022 will be shipped with the new logo SEMTO ENGINE. Any advice, please email us at service@enginediy.com
High Simulation: The engine model with a realistic appearance and red sport elements meaning thunderbolt movement, whcih gets closer to a real engine.
Miniature IC Engine Model: Treated by aluminum CNC processing and oxidation coloring, this SEMTO/ OTTO & TOYAN engine features a meticulous surface, compact structure and lightweight body.
Dual Synchronous Belt Pulley: The timing structure of a dual synchronous belt pulley greatly reduces the risk of gear jumping in high-speed operation.
Rocker Arm: The short rocker arm makes the valve switch operation more accurate.
Carburetor: Enjoy easier adjustment and more sensitive throttle response thanks to the brand-new signal carburetor.
Electrical Starting: Equipped with a high-torque starting motor for a more convenient and smooth start.
Enjoy DIY Fun: You can walk through the internal structure and mechanical operation principle of the engine while enjoying DIY assembling fun with the desktop engine model.
Wide Applications: Blending perfectly with a gearbox for superior compatibility and an excellent guarantee to upgrade, the product makes a stunning mechanical artware, an ideal gift for mechanical engine enthusiasts and a superb teaching aid for demonstration teaching in physical & mechanical classes.
Warm Tips: Starting Ignition set is not included, please prepare or buy it by yourself. If there is any questions or advice, please feel free to contact us service@enginediy.com
Know More: .Material: Metal .Brand: SEMTO/ OTTO MOTOR & TOYAN .Model: ST-NF2/ FS-L200AC .Form: Kit Version .Engine Type: Nitro Internal Combustion Engine Model .Valve Mechanism: SOHC .Displacement: 7 (3.5*2)cc .Cylinder: Inline Double-cylinder .Stroke: Four Stroke .Cyilinder Diameter: 16.6mm .Stroke: 17.00mm .Speed: 4000-16000rpm .Power: 0.6ps .Cooling Mode: Air Cooling .Lubrication Mode: Mixed Oil Lubrication (add grease) .Starting Mode: Electric .Ignition Mode: Ignition Modules (Not Included) .Type of Electric Plug: F-type Four-stroke Electric Plug (Not Included) .Starting Voltage: 7.4V 2S Li battery (Not Included) .Fuel Type: 20-25% Nitro Fuel .Product Dimensions: 11.2 x 9 x 9.2cm .Product Weight: 535g .Package Dimensions: 14.5 x 11 x 11.2cm .Package Weight: 800g .Packing: Graphic Carton .Ages: 14+
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Questions about Shipment
Q1 : Do you ship worldwide? A1 : Yes, we can ship worldwide. Q2 : Where you ship goods from? A2 : Our warehouse is located in China, the goods will be shipped from China mainland.
Q3 : What is the shipping cost? A3 : For giving customer good shopping experience, we offer free international shipment.
Q4 : What is the shipping time? A4 : For expected delivery date, please check in this page: Expected Delivery Time
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Q5 : What if my address is wrong? A5 : If the recipient's address was wrong, after the failed delivery, the parcel should be returned back to sender. After we receive the parcel, we will contact you for an updated address and arrange the new shipment.
Questions about Return & Refunds Q1 : What items are returnable? A1 : a)- We can accept returns or exchanges within the 30-day period. b)- All returned items must be in the original condition: unused, unwashed, and unworn. No exceptions. Q2 : How do I return a product? A2:Contact with Enginediy Service Team service@enginediy.com to confirm details to make sure the item is meet the return condition. After the agreement, Service Team will send the detailed return information, please offer return tracking number after return shipment. Q3 : What is you refund policy? A3 : Refunds are processed within 1-5 business days, after you received our confirmation on the cancellation.
Q4 :How will you refund me? A4 : The refund are applied to the original payment method.
I ordered the RED ST-NF2 engine it came in just a couple days however as of this review the gas conversion kit and the generator base haven’t shipped. It went together well with the full color instructions included I was a little disappointed in that I ordered the RED engine and unlike the pictures the ONLY thing that is red is the valve cover. I’m a mechanic so assembly was pretty straightforward HOWEVER when it was fully assembled there was no compression due to the rocker arms having less than 0 lash there is no provision to adjust the valve lash so I ended up milling about 0.010 thousandths off the the lash caps now I have full compression and a little bit of valve clearance. I really wish it had the red sprocket accents like advertised but the black anodized ones match the rest of the engine I guess
M
Madan Pushpakath (Singapore, SG)
Nice little 4 stroke engine
It's an excellent kit for the beginner or medium skilled hobbyist. Instructions are clear and kit is very well organized. I followed couple of build videos to understand the minor tweaks and lubrication. With the starter kit connected, it worked on the first try. Highly recommended
D
Dwayne Cress (Boston, US)
Nice product
Very well made , would be awesome if it was water cooled, but the fan really keeps it cooled, runs very well, starts in one hit on button, can't wait to see if there will be opportunities to upgrade it, wasn't hard to put together, instruction book was well illustrated, I'm looking at setting up a youth program to teach young teens in skills to build and understand small engines, to maybe rc builds.
L
Leon Brown Jr (Oklahoma City, US)
I like the little engine but I don't have the plugs or the other stuff to get it started would like to get it going so I can start it
H
Hans Mulder (Schagen, NL)
Nice little engine
Nice building kit of a 7 cc 2 cilinder engine. The kit is very complete, and easy to build. Only one minor detail : the box with small parts and screws is not transport proof. There is space between lit and box that alows the parts to move and mingle. It becomes a puzzle. The engine is OK after the puzzle is sorted out. Nice engineering.
I ordered the RED ST-NF2 engine it came in just a couple days however as of this review the gas conversion kit and the generator base haven’t shipped. It went together well with the full color instructions included I was a little disappointed in that I ordered the RED engine and unlike the pictures the ONLY thing that is red is the valve cover. I’m a mechanic so assembly was pretty straightforward HOWEVER when it was fully assembled there was no compression due to the rocker arms having less than 0 lash there is no provision to adjust the valve lash so I ended up milling about 0.010 thousandths off the the lash caps now I have full compression and a little bit of valve clearance. I really wish it had the red sprocket accents like advertised but the black anodized ones match the rest of the engine I guess
M
Madan Pushpakath (Singapore, SG)
Nice little 4 stroke engine
It's an excellent kit for the beginner or medium skilled hobbyist. Instructions are clear and kit is very well organized. I followed couple of build videos to understand the minor tweaks and lubrication. With the starter kit connected, it worked on the first try. Highly recommended
D
Dwayne Cress (Boston, US)
Nice product
Very well made , would be awesome if it was water cooled, but the fan really keeps it cooled, runs very well, starts in one hit on button, can't wait to see if there will be opportunities to upgrade it, wasn't hard to put together, instruction book was well illustrated, I'm looking at setting up a youth program to teach young teens in skills to build and understand small engines, to maybe rc builds.
L
Leon Brown Jr (Oklahoma City, US)
I like the little engine but I don't have the plugs or the other stuff to get it started would like to get it going so I can start it
H
Hans Mulder (Schagen, NL)
Nice little engine
Nice building kit of a 7 cc 2 cilinder engine. The kit is very complete, and easy to build. Only one minor detail : the box with small parts and screws is not transport proof. There is space between lit and box that alows the parts to move and mingle. It becomes a puzzle. The engine is OK after the puzzle is sorted out. Nice engineering.
