Sylvie Willis
The impulse fuel line is an important component of a chainsaw, connecting the carburetor with the crankcase which is attached to the engine. Its main purpose is to create pressure and a vacuum inside the carburetor, which allows the chainsaw to start pulling in fuel from the fuel tank. A malfunctioning impulse line can lead to a starved engine and poor performance from your chainsaw.
| Characteristics | Values |
|---|---|
| Main purpose | To create pressure |
| How it creates pressure | Generates pressure inside the carburetor to create a vacuum |
| What the vacuum does | Allows the chainsaw to start pulling in fuel from the fuel tank |
| What happens if the impulse line is cracked | The chainsaw will run poorly or not at all |
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What You'll Learn
The impulse line connects the carburetor with the crankcase
The impulse line sends crankcase pressure to the pump diaphragm on the carburettor, actuating the pump and drawing fuel from the tank. If the impulse line is cracked, the carburettor will not pump enough fuel and the chainsaw will run poorly or not at all.
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The impulse line creates pressure inside the carburetor
The impulse line sends crankcase pressure to the pump diaphragm on the carburettor, thereby actuating the pump and drawing fuel from the gas tank. This is the first cycle of the impulse line. Once the first cycle is complete, the second cycle begins immediately. The only difference this time is that there is both air and fuel inside the crankcase. As the piston starts lowering, both the air and fuel present inside start getting pressurized.
A malfunctioning impulse line can quickly lead to a starved engine, which in turn leads to poor performance from your chainsaw.
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The pressure creates a vacuum inside the carburetor
The impulse line connects the carburetor with the crankcase, which is attached to the engine. The pressure created by the impulse line generates a vacuum inside the carburetor, which allows the engine to start pulling in fuel from the fuel tank. This is how the impulse line manipulates the flow of fuel inside the chainsaw.
The impulse line sends crankcase pressure to the pump diaphragm on the carburettor, thereby actuating the pump and drawing fuel from the tank. The pressure created by the impulse line also causes the fuel valve to open, and the negative pressure of the vacuum causes the fuel to start filling up the area. As the piston starts lowering, the air and fuel present inside start getting pressurised. This is the second cycle of the impulse line, which begins immediately after the first cycle is complete.
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The vacuum allows the impulse line to manipulate the flow of fuel
The impulse line in a chainsaw connects the carburetor with the crankcase, which is attached to the engine. The impulse line generates pressure inside the carburetor to create a vacuum, which allows it to start pulling in fuel from the fuel tank. The negative pressure of the vacuum causes the fuel to start filling up the area. This is how the impulse line manipulates the flow of fuel inside the chainsaw.
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The impulse line sends crankcase pressure to the pump diaphragm
The impulse line in a chainsaw connects the carburetor with the crankcase, which is attached to the engine. The impulse line sends crankcase pressure to the pump diaphragm, which generates pressure inside the carburetor to create a vacuum. This allows the chainsaw to start pulling in fuel from the fuel tank. The negative pressure of the vacuum causes the fuel to start filling up the area. This is how the impulse line manipulates the flow of fuel inside the chainsaw.
The first and second steps make up the first cycle of the impulse line. Once the first cycle is complete, the second cycle begins immediately. The only difference is that there is both air and fuel inside the crankcase. As the piston starts lowering, both the air and fuel present inside start getting pressurized. This process continues until the chainsaw has the fuel it needs to function properly.
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Frequently asked questions
An impulse fuel line connects the carburetor with the crankcase, which is attached to the engine.
The impulse fuel line generates pressure inside the carburetor to create a vacuum, which allows it to start pulling in fuel from the fuel tank.
If the impulse fuel line is cracked, the carburettor will not pump enough fuel and the chainsaw will run poorly or not at all.
