Where does the Impulse line go on a snowmobile?
Kits are cheap, I would probably rebuild it anyway just as a maintenance item. Check the impulse line (usually black) that goes from the crankcase to the fuel pump, too.
What to do if your snowmobile fuel pump is not working?
If there is a vacuum on the fuel intake, pulse in the crankcase hose, and pressure on the carburetor line, check all of your tubing to ensure that there are no leaks or cracks. If your fuel pump is malfunctioning, you can use a rebuild kit to repair it rather than buying a new fuel pump.
What happens when the fuel line is cracked on a snowmobile?
If that line is cracked, the pressure/vacuum impulse that is required to run the fuel pump will be absent and the pump can’t pump fuel. Pull the line from the carb and put the end of it into a container.
Can a fuel pump be mounted on the crankcase?
If the pump is close to the crankcase, the pulse tube could become damp and the efficiency of pumping fuel will be greatly reduced. The pump should never be mounted on the crankcase of the engine. This is because the engine vibrates.
Why is the fuel pump on my snowmobile not working?
If fuel is coming out of the pump impulse line, then you either have the wrong lines hooked up or you have a bad pump. If gas is just coming out of the motor, then the motor is flooded. Some sleds (most Polaris) have a drain screw in the crankcase under each rod to drain fuel from the motor. Most sleds don’t.
If the pump is close to the crankcase, the pulse tube could become damp and the efficiency of pumping fuel will be greatly reduced. The pump should never be mounted on the crankcase of the engine. This is because the engine vibrates.
How does the pulse line in a fuel pump work?
The pulse line connects the pulse chamber. The pressure of the crankcase is pushed by the pulse through a pair on one way valves and fuel passes continuously, and in a correct measure, to power the engine.
Why is gas coming out of the fuel pump?
If fuel is coming out of the pump impulse line, then you either have the wrong lines hooked up or you have a bad pump. If gas is just coming out of the motor, then the motor is flooded. Some sleds (most Polaris) have a drain screw in the crankcase under each rod to drain fuel from the motor.