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Table of Contents
Summary of Contents for HOWIN L4-172
- Page 1 HOWIN L4-172 Engine Manual...
- Page 2 First of all, thank you for choosing the HOWIN ENGINE series. The L4-172 is an ultra-precision four-cylinder four-stroke engine. In order to better understand and operate your engine for superior performance, please read the operating instructions and basic precautions of this manual before you operate the engine.
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Page 3: About Your Machine
1. About your machine Please do not disassemble the model without permission as the high speed and high temperature of the engine could injury you or or have other negative effects. Unless accompanied or instructed by an adult, persons under the age of 16 should not use this engine. If the engine is transferred to others, please transfer this manual together. -
Page 4: Product Description
2. Product description The L4-172 model is a fuel-burning engine model with a complex structure and perfect functions, which is composed of more than 100 components and is almost close to the real engine except for the scale. Designed in 1/8 scale, the model features a high speed of 15,000 and powerful torque, providing power for 1/8 oil-operated cars and oil boats. -
Page 5: Product Functions
2.1 Product functions... -
Page 6: Product Dimensions
2.2 Product dimensions... -
Page 8: Basic Data
3. Basic data Number Name Information Model L4-172 Form Finished Product Net Weight 1200g 150.9*117.8*107.6mm (The width is calculated according to the Dimensions (L,W,H) widest position of the exhaust and intake pipes.) Engine Type Nitro Carburetor Single Carburetor Displacement 17.2cc（4×4.3cc）... -
Page 9: Machine Start
4. Machine start 1. Water-cooling equipment, glow plug, fuel tank and other necessary components need to be installed before running the engine. Component parameters: 1) Water-cooling equipment: Only need an ordinary water-cooled radiator with a fan, and the size is not less than 100*100mm, otherwise the heat dissipation effect is not ideal. - Page 10 5. Regular cleaning & maintenance Users need to clean and maintain the engine regularly for better use and longevity. Our company will also provide long-term maintenance services for this product. 1. Carefully clean the dust and oil remaining on the air inlet of the carburetor. Users can install an air filter to ensure the cleanliness of the incoming air.
- Page 11 6. Precautions 1. Do not add other fuels except nitro to the fuel tank! 2. The cooling system needs to be installed before the engine starts. 3. Do not disassemble the machine, and the machine after disassembly will not enjoy the warranty! 4.
- Page 12 7. Fault maintenance 7.1 The main reason why the engine won’t start Engine cylinder depression or air leak: The engine you received is brand new, and the cylinder liner and piston rings are not tightly matched. Timing adjustment: The timing error causes incorrect valve opening & closing time so that the engine will leak air and the piston will block the valve.
- Page 13 7.2 Adjustment method of cylinder pressure reduction and air leakage The engine you received is brand new. In order to ensure that your engine boasts a strong cylinder pressure, our piston ring clearance is guaranteed to be within 0.03mm. However, there are errors in the various parts of metal processing, and there may be cases where the cylinder liner and the piston ring are not tightly matched, air leakage and cylinder pressure reduction.
- Page 14 7.3 Timing adjustment method...
- Page 15 We specially made corresponding marks on the camshaft synchronous wheel and crankshaft synchronous wheel for convenient adjustment of the engine timing. There is a small hole on the camshaft synchronous wheel, and the outer edge of the crankshaft synchronous wheel has been ground. 1.
- Page 16 7.4 Adjust the carburetor 1. The treatment method for the fuel not entering the carburetor: Connect the fuel inlet pipe, block the air intake of the carburetor with one hand, rotate the engine for the fuel entering the carburetor, release the hand blocking the carburetor, and try to start. 2.
- Page 17 We support repair, replacement and return for engine quality problems caused by non-human factors. 2.Please contact the HOWIN ENGINE dealer in your country or location for various components and a full set of services, or if you purchased online, you can obtain them via the Internet. For detailed information on each component, you can request it from your dealer by sending an e-mail.
- Page 18 Addendum: Parts List Name Name Engine Block Cam Bearing Cylinder Liner Piston Ring Lifter Valve Spring Rocker Arm Shaft Start Motor Valve Seat Axle Sleeve Rocker Cylinder Head Gasket Valve Air Valve Camshaft M5 Water Nozzle Crankshaft M6 Water Nozzle Cam Sync Wheel M4 Oil Nozzle Decorative Sync Wheel...
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