Snowmobile World banner

1 - 3 of 3 Posts

·
Registered
Joined
·
508 Posts
Discussion Starter #1
What does the needle in the carb do for idle?  If the needle sits higher in the carb what does it do?  If the needle sits lower in the carb (towards the fuel pump) what does it do?
 

·
Registered
Joined
·
686 Posts
Been sledding!  


I think if the needle is higher it won't let in as much fuel as it should with each impulse signal from the crankcase. You would probably have symptoms like not being able to reach full rpm because of fuel starvation. If the needle was too low it may not close the fuel flow off because the needle could not fully seat. That may cause the fuel to go back out the inlet fuel line instead of into the carb circuits so in effect there would be no fuel pumping action. I always used to set the inlet lever so it was bent a very tiny bit towards the fuel pump side so that if it did bend back a bit it would be going towards the recommended setting.
 
1 - 3 of 3 Posts
Top