RETROL & OKMO B03 Miniature 4-Stroke Hit and Miss Gasoline Engine Model RTR (Red/Green)
Product Information:
Century-Old Intermittent Firing Heritage:
Based on 1910–1935 Amanco farm stationary engines, this model features a working centrifugal governor that physically latches the exhaust valve to produce a genuine hit-and-miss firing cycle. It replicates the iconic "pulse-idle-idle-pulse" firing pattern, offering a true mechanical experience rather than a simulated effect.
Ready-to-Run Design with Easy Setup:
Supplied as a pre-assembled RTR unit, it requires no complex assembly. It includes a complete mechanical ignition system and supports manual flywheel starting or drill-assisted starting. The wooden base ensures stable operation. Just add a battery, fuel, cooling water, and oil to experience real four-stroke engine operation.
CNC-Machined All-Metal Craftsmanship:
The main body features precision CNC-machined aluminum alloy, paired with brass fittings and a stainless steel flywheel. The mechanical structure fully restores the classic structure, combining a vintage appearance with longevity for both repeated operation and long-term static display.
Desktop Collectible and Display Piece:
Compact in size, it fits well in studies, workshops, offices, and display cabinets. During operation, the centrifugal flyweights, valves, and flywheel movements are visible. It serves both as an interactive model and a static display, making it a standout collectible for mechanical enthusiasts, vintage engine collectors, and history fans.
Educational Industrial Science Model:
More than a vintage ornament, it is an intuitive teaching model for internal combustion engines. The evaporative water cooling, adjustable drip lubrication, and mechanical touch ignition are all exposed, allowing direct observation of the complete Hit-and-Miss four-stroke working logic. Suitable for mechanical interest education for ages 16 and up.
Specifications:
.Material: Metal + Wood
.Color: Red/Green
.Model: B03
.Form: Ready to Run (RTR)
.Engine Type: Gasoline Internal Combustion Engine
.Cylinder: Horizontal Single Cylinder
.Stroke: Four-Stroke
.Displacement: 3.6 cc
.Bore: 16.0 mm
.Stroke Length: 19.0 mm
.RPM Range: 500–3000 rpm
.Starting Method: Manual / Drill Start
.Cooling Method: Evaporative Water Cooling
.Lubrication Method: Mixed-Fuel Splash Lubrication
.Lubrication Ratio: Gasoline / Oil 25:1 to 30:1
.Ignition Method: Mechanical Trigger-Controlled Ignition (Igniter Included)
.Spark Plug: Imperial Thread 3/16-40 (Spark Plug Included)
.Starting Power: 1.5V AA Battery × 1 (Battery Not Included)
.Fuel: 92# Gasoline or Higher Recommended (Fuel Not Included)
.Engine Oil: 2T/4T 10W50 Engine Oil Recommended (Lubricating Oil Not Included)
.Product Weight: 1650g
.Package Weight: 1750g
.Product Dimensions: 22.5 x 11.5 x 13cm
.Package Dimensions: 27 x 16 x 18cm
.Packaging: Graphic Carton
.Age: 16+
Packing List:
.Engine (with Spark Plug) *1
.Equipment Box *1
.Wooden Base *1
.Fuel Tank *1
.Fuel Line *1
.Drill Starting Shaft *1
.Accessory Kit *1
.Instruction Manual *1
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 TimeQ5 : How do I track my package?A5 :You can track your order on 17track.net . Or if you need a team members help check up please contact with our service team service@enginediy.com and we will be in touch with a status update.
Questions about Payment & OrderQ1 : What payment terms you can accept?A1 : For payment, we accept Paypal and Credit Card.
Q2 : My payment was declined, why? How to solve it ?A2 : If you made the purchase via Credit Card and failed, could you please contact with Stripe Support Team for solution? Or if the issue can be solved, please no worry, we accept Paypal payment as well.
Q3 : How do I cancel my order?A3 : For the order, if not shipped out yet, please contact with our Service Support Team service@enginediy.com , we will cancel your order and give you full refund.
Q4 : Is my information is securing using this site?A4 : Yes, Enginediy.com takes precautions to protect your personal information. When you submit sensitive information via the website, your information is protected both online and offline. Please don’t worry for this.
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 & RefundsQ1 : 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.
