The VORTRIXE & TOYAN FSL200 Twin-Cylinder Four-Stroke Mini Engine Model is an incredibly fun little engine. Not only does it let you experience the assembly process, but you can also DIY it into many exciting projects like RC cars and RC boats. The most astonishing part? This tiny engine can reach a maximum speed of 14,000 RPM! Let's get started assembling it!
Step 1
Remove the crankshaft connecting rod and install the main flywheel and starter flywheel onto the crankshaft.
Step 2
Remove the piston rings and install them onto the piston. There is a technique involved here: slowly push the ring along the piston ring groove from one end to the other. After installation, use the tool provided in the package to install the pistons with rings into each cylinder. Pay special attention to ensure that the piston rings are reinstalled into their corresponding cylinders and not mixed up. Check for airtightness.
Step 3
Loosen the two piston crankshaft connecting rods and apply lubricant evenly at each joint. Reinstall the crankshaft connecting rods. Two critical installation notes:
1. The connecting rods have corresponding markings; ensure they are aligned.
2. Tighten the connecting rod bolts securely, preferably using threadlocker. If not properly secured, the connecting rod may detach at high speeds, causing damage to the connecting rod and engine block.
Then reinstall the oil pan.
Step 4
Remove the cylinder head and camshaft. After securing them in place, install the cylinder head onto the cylinder. Remember to place the gasket in between—this step is crucial!
Step 5
Remove the four rocker arms, two rocker arm brackets, and four valve covers. Install the four valve covers onto the valve chambers, then secure the rocker arms onto the valve covers. Note that the protruding portion of the rocker arms contacts the valve covers. After installation, check if the valve covers have approximately 2mm of vertical movement space—this clearance is optimal.
Step 6
Remove the throttle body bracket, install it onto the engine, and then mount the throttle body onto the bracket.
Step 7
After installing the air-cooled fan, mount the fan onto the belt. This step involves a critical procedure: aligning the timing. To do this: remove the belt from the crankshaft connection point. Ensure the arrow on the crankshaft points directly downward toward the 6 o'clock position. Simultaneously, the arrow on the throttle camshaft pulley must also point directly downward toward the 6 o'clock position!
Step 8
After installing the starter motor, this step is relatively straightforward. Apply grease to the valve rocker arms inside the valve cover, then reinstall the cylinder head. Remember to install the gasket between the cylinder head and cylinder block—do not skip this step. Secure the head using the cross-pattern bolting method!
Step 9
Install the electric heating head (the nitromethane version uses an electric heating head, while the gasoline version uses an ignition spark plug). There is a washer in front of the spark plug—do not forget it.
Step 10
Next, install the ignition wire (required for nitromethane versions; gasoline versions skip this step). This is necessary to complete the electrical circuit, enabling the glow plug to function properly.
Step 11
Next, install the electric starter or spark plug wire, mount the fuel tank, connect the fuel lines, add fuel, and connect the power source. You are now ready to start this mini twin-cylinder four-stroke engine for the first time!
Let's test its RPM—it revved past 13,000 on the first try! We can't wait to see more DIY possibilities with this engine. It needs more enthusiasts to keep exploring its potential. Add building this mini twin-cylinder engine kit to your weekend plans now!
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