Do you have a question about the Sportsman 400 and is the answer not in the manual?
Questions and answers
Jerry harvey
July 7, 2025
What are the vacumn connections on the carb
1 comments:
Mr. Anderson
August 28, 2025
The Polaris Sportsman 400 carburetor has two main vacuum-related connections:
1. Top connection – This is connected to the vacuum slide's diaphragm. It is part of the system that regulates the slide movement based on engine vacuum. The chamber below the diaphragm is vented to atmospheric pressure, usually through a passage on the airbox side of the carburetor.
2. Bottom connection – This is typically the float bowl vent line. It supplies atmospheric pressure to the fuel in the float bowl and must be routed properly and free of kinks.
Additionally, there may be a vacuum line referred to as the impulse line, which connects to the fuel pump. It uses engine vacuum to operate the diaphragm in the pump and move fuel.
The loose line with a check valve found in the engine area is likely part of the vacuum or vent system and may connect to one of these ports. Proper routing is important to ensure correct fuel flow and carburetor function.
This answer is automatically generated
Robert Straub
August 21, 2025
How do you adjust the air mixture screw on a 2001 polaris sportsman 400 while running if the screw is on the bottom of the carbeurator
STEPHANIE CLARK
May 28, 2025
2013 pOLARIS SPORTSMAN 400 HO- rUNS GREAT WITHOUT THE AIRBOX LID. rUNS TERRIBLE WITH IT. ANY SUGGESTIONS?
John weber
May 3, 2025
Show where filters are located in pitcures
Kevin
April 22, 2025
Is this the correct orientation of the transmission levers to connect the shift rods
Need help?
Do you have a question about the Sportsman 400 and is the answer not in the manual?
Questions and answers
What are the vacumn connections on the carb
The Polaris Sportsman 400 carburetor has two main vacuum-related connections:
1. Top connection – This is connected to the vacuum slide's diaphragm. It is part of the system that regulates the slide movement based on engine vacuum. The chamber below the diaphragm is vented to atmospheric pressure, usually through a passage on the airbox side of the carburetor.
2. Bottom connection – This is typically the float bowl vent line. It supplies atmospheric pressure to the fuel in the float bowl and must be routed properly and free of kinks.
Additionally, there may be a vacuum line referred to as the impulse line, which connects to the fuel pump. It uses engine vacuum to operate the diaphragm in the pump and move fuel.
The loose line with a check valve found in the engine area is likely part of the vacuum or vent system and may connect to one of these ports. Proper routing is important to ensure correct fuel flow and carburetor function.
This answer is automatically generated
How do you adjust the air mixture screw on a 2001 polaris sportsman 400 while running if the screw is on the bottom of the carbeurator
2013 pOLARIS SPORTSMAN 400 HO- rUNS GREAT WITHOUT THE AIRBOX LID. rUNS TERRIBLE WITH IT. ANY SUGGESTIONS?
Show where filters are located in pitcures
Is this the correct orientation of the transmission levers to connect the shift rods
i need the blowup of the exhaust system.