Operating the Engine, Starting the Engine

G3700

5. Operating the Engine

WARNING

It is very dangerous to run a chainsaw that mounts broken parts or lacks any parts.

Before starting engine, make sure that all the parts including bar and chain are installed properly.

■STARTING THE ENGINE

1.Fill fuel and chain oil tanks respectively, and tighten the caps securely.

Chain oil

Fuel

2. Put the switch to “I” position.

Switch

Throttle interlock

Throttle lever

3.Pull out the choke knob to the second-stage posi- tion. The choke will close and the throttle lever will then be set in the starting position.

Choke knob

5.	When engine has ignited first, push in the choke knob
	to the first-stage position and pull the starter again
	to start the engine.
6.	Allow the engine to warm up with the throttle lever
	pulled slightly.	G
		G
	WARNING	B
Keep clear of the saw chain as it will start rotating
upon starting of engine.

■CHECKING OIL SUPPLY

WARNING

Make sure to set up the bar and the chain when checking the oil supply.

If not, the rotating parts may be exposed. It is very dangerous.

After starting the engine, run the chain at medium speed and see if chain oil is scattered off as shown in the figure.

Chain oil

The chain oil flow can be changed by inserting a screw- driver in the hole on bottom of the clutch side. Adjust according to your work conditions.

Adjuster

MAX

MIN

NOTE

•When restarting immediately after stopping the en- gine, Choke knob in the first-stage position (choke open and throttle lever in the starting position)

•Once the choke knob has been pulled out, it will not return to the operating position even if you press down on it with your finger. When you wish to return the choke knob to the operating position, pull out the throttle le- ver instead.

4.While holding the saw unit securely on the ground, pull the starter rope vigorously.

WARNING

Do not start the engine while hanging the chain saw with a hand. The saw chain may touch your body. It's very dangerous.

NOTE

The oil tank should become nearly empty by the time fuel is used up. Be sure to refill the oil tank every time when refueling the saw.

■ADJUSTING CARBURETOR

L needle

H needle

Idle adjusting screw

The carburetor on your unit has been factory adjusted, but may require fine tuning due to change in operating conditions.

Before adjusting the carburetor, make sure that provided are clean air/fuel filters and fresh, properly mixed fuel.

When adjusting, take the following steps:

NOTE

Be sure to adjust the carburetor with the bar chain attached.

GB-9

G3700 specifications

The Zenoah G3700 is a powerful and reliable engine widely recognized in the world of outdoor power equipment, especially for applications in the fields of landscaping, forestry, and agriculture. Engineered with precision, this two-stroke engine is designed to deliver consistent performance, making it a preferred choice for professionals and enthusiasts alike.

One of the standout features of the Zenoah G3700 is its impressive displacement of 36.3cc, providing powerful horsepower while maintaining a lightweight design. This balance ensures that tools powered by the G3700 engine remain user-friendly and easy to handle, especially during extended periods of operation. The engine produces around 1.5 kW of power, enabling efficient cutting, trimming, and other demanding tasks with ease.

The G3700 employs advanced combustion technologies that optimize fuel efficiency while minimizing emissions. This not only enhances the engine's performance but also aligns with modern environmental standards, making it a more sustainable option for users concerned about their ecological footprint. The integration of a catalytic converter contributes significantly to reducing harmful exhaust emissions, thus promoting cleaner operation.

Additionally, the engine is equipped with a sophisticated ignition system that ensures reliable starting and smooth operation. The electronic ignition system reduces maintenance needs over time and enhances overall engine reliability. Moreover, the G3700 features a robust air filtration system that significantly improves air intake, leading to better performance and lifespan for the engine.

Durability is another characteristic that sets the Zenoah G3700 apart. Its construction utilizes high-strength materials that can withstand the rigors of heavy-duty use, leading to longer intervals between service and an overall reduction in operational costs. The engine's design has been carefully crafted to dissipate heat efficiently, preventing overheating during prolonged use.

The Zenoah G3700 is often used as the power source for a variety of applications, including chainsaws, brush cutters, and trimmers, accommodating the diverse needs of professionals in different landscaping and maintenance contexts. Its versatility and ease of integration with various attachments further enhance its appeal in the market.

In conclusion, the Zenoah G3700 is a testament to advanced engineering in two-stroke engine design, offering a blend of power, efficiency, durability, and user-friendliness, making it an excellent choice for anyone seeking reliable performance in their outdoor power equipment. Whether for professional landscaping or home gardening projects, the G3700 stands out as an invaluable tool.