TOYAN engine FAQs | EngineDIY

First of all, thank you for purchasing our products. TOYAN engines are composed of very precision parts. Before operating your engine, please read the operation manual and strictly abide by the entire content of the operation manual to familiarize yourself with the engine control and other functions.

1.What are the necessary components for the engine to start?

Igniter, hot spark plug (Nitro Version) or spark plug (Gasoline Version). Starting requires a fuel tank and a 7.4V 3000mAh 30C starting battery.

2.What are the differences between the Gasoline Version and the Nitro Version?

Differences include the Cylinder Sleeve, Compression Ratio, and Carburetor.

3.Can the Gasoline Version and Nitro Version be used interchangeably?

The Gasoline Version can burn Nitro, but the Nitro Version cannot burn gasoline.

4.Does the single engine come with an igniter?

No, none of the Gasoline Version and Nitro Version come with an igniter.

5.Is it only the model that cannot start?

No, it can start.

6.Is it necessary to add engine oil?

Yes, for both the Gasoline Version and Nitro Version.

7.Does the engine require lubricating oil?

Yes, lubricating oil is needed for all friction surfaces, including piston pin, small & big end of the connecting rod, camshaft, and rocker arm.

8.Is the compression ratio higher in the Gasoline Version or the Nitro Version?

The Nitro Version has a higher compression ratio.

9.Does it come with a screwdriver?

No, it does not come with one. The assembly version comes with a built-in auxiliary tool.

10.What is the specification of the silicone oil tube?

It measures an inner diameter of 2.5mm, and an outer diameter of 4.5mm. The tube measuring an inner diameter of 4mm, an outer diameter of 6mm is used for connecting the spark plug and igniter.

11-1. V800W Carburetor Adjustment Suggestions

1. Ensure synchronous installation of the intake openings of both throttle pillars. If there is a significant difference, it may increase the difficulty of adjusting the needle.
2. It is recommended to dismantle the exhaust pipe to better feel all cylinders under different exhaust pressures and conditions. (When feeling the exhaust pressurein person, maintain a safe distance to prevent burns from high-temperature gases.)
3. Tighten the main & auxiliary oil needle to the minimum. Loosen the auxiliary oil needle by 2-2.5 turns. For a new engine, it is suggested to set the main needle at 4-5 turns for a slightly rich mixture to assist in breaking in. Adjust the minimum air intake to 1.5-2.0mm at idle.
4. Place the throttle at the minimum opening to better suck fuel into the cylinders. Start the engine and keep the throttle at 30% to stabilize.
5. If there is weak exhaust or intermittent explosions of carburetor on the side of the cylinder, adjust thecorresponding main needle, clockwise in 15° increments until it approaches the status of other cylinders. Adjust the cylinders in order from the least optimal combustion to the best, clockwise.
6. Ifone cylinder has a faster exhaust speed and higher temperature than the others after starting, adjust the main needle of that cylinder counterclockwise to achieve even performance.
7. When all cylinders are adjusted to a basic consistent condition, smoothly accelerate and decelerate the throttle, listening to the sound to determine lean or rich fuel conditions. For leanoil, adjust the auxiliary oil needle clockwise in increments of 20° each time, and counterclockwise for rich oil.
8. After adjustment, clean and reinstall the exhaust pipe after the engine cools down.

Notes: Due to the shared characteristics of two carburetors among eight cylinders, adjusting one carburetor may affect the conditions of other cylinders. Therefore, adjustment requires patience, multiple attempts, and skill acquisition through experimentation.

11-2. Dual-Cylinder Methanol Engine Single Carburetor Adjustment Method

Start by turning both main and auxiliary oil needles clockwise to the bottom. Then, turn the main needle out 4.5-5 turns and the auxiliary oil needle out to a gap of about 1mm. Begin low-speed break-in of the engine, and after 2-3 fuel tanks, the engine should start very well.

When adjusting the main needle, open the throttle to 4/5 full and slowly turn the main needle with a screwdriver. As soon as the engine sounds very sharp, it indicates the engine’s maximum speed has been reached. Do not let the engine sound like dry coughing, as it signifies a lean fuel mixture and can cause significant damage and overheating. For beginners, a slightly rich mixture is safer. Then, loosen the needle a few turns to provide a slightly rich fuel mixture, making the engine more powerful. At this point, quickly accelerate and decelerate the throttle; the engine should not stall, and the idle should be stable. The engine can reach speeds of up to 13,000 RPM, indicating normal operation.

11-3. L400 Carburetor Adjustment Suggestions

1. Ensure synchronous installation of the intake openings of all four throttles. If there is a significant difference, it may increase the difficulty of adjusting the needle.
2. It is recommended to dismantle theredexhaust pipe to better feel all cylinders under different exhaust pressures and conditions. (When feeling the exhaust pressure in person, maintain a safe distance to prevent burns from high-temperature gases.)
3. Tighten the main & auxiliary oil needle to the minimum. Loosen the auxiliary oil needle by 1-1.5 turns. For a new engine, it is suggested to set the main needle at 2.5 turns for a slightly rich mixture to assist in breaking in. Adjust the minimum air intake to 1.5-2.0mm at idle.
4. Place the throttle at the minimum opening to better suck fuel into the cylinders. Start the engine and keep the throttle at 30% to stabilize.
5. If there is weak exhaust or intermittent explosions of carburetor on the side of the cylinder, adjust thecorresponding main needle, clockwise in 15° increments until it approaches the status of other cylinders. Adjust the cylinders in order from the least optimal combustion to the best, clockwise.
6. Ifone cylinder has a faster exhaust speed and higher temperature than the othersafter starting, adjust the main needle of that cylinder counterclockwise to achieve even performance.
7. When all cylinders are adjusted to a basic consistent condition, smoothly accelerate and decelerate the throttle, listening to the sound to determine lean or rich fuel conditions. For leanoil,adjust the auxiliary oil needle clockwise in increments of 20° each time, and counterclockwise for rich oil.
8. After adjustment, clean and reinstall the exhaust pipe after the engine cools down.

Notes: Due to the working characteristics of multi-cylinder carburetors and intake manifolds, adjusting one cylinder may often affect the conditions of other cylinders. Therefore, adjustment requires patience, multiple attempts, and skill acquisition through experimentation.

12. Are there any recommended tools for selection?

For Twin-Cylinder Enigne, tools including hex screwdrivers 1.5, 2.0, 2.5, 3.0, needle-nose pliers, and M8 heat head sleeve.

For V8 Engine, tools may include hex screwdrivers 1.5, 2.0, 2.5, 3.0, needle-nose pliers, wrench, slot type screwdriver, tweezers, snap ring pliers.

In the Twin-Cylinder Enigne parts set, there are two auxiliary tools, a long socket for tapping bearings and a short one for assisting in installing piston rings.

In the V8 parts set, there are two auxiliary tools, a small one for tapping camshaft bearings and a large one for tapping the flywheel.

13. Starter Motor Wiring Tips?

Ensure correct polarity when connecting the starter motor.

Connect the black wire from the motor to the positive terminal. 

Connect the red wire from the motor to the negative terminal. 

(Markings with a red dot indicate the positive terminal.)