83 Fuel pump

[tufftom4]

I am trying to get my 83 VR running and it starts for a few seconds with the choke on I have the paper work that the carbs were just serviced so it sounded like it was not getting fuel so I pulled the fuel line off of the fuel pump and when I turn on the key it pumps 3 times then stops shouldn't it pump until it has pressure?

[Prairiehammer]

No.

A safety feature of the fuel pump is that it will pump for only about five seconds and if the engine is not running, the fuel pump stops pumping.

Shut off the ignition key and turn it back on. Does the fuel pump again for a few seconds? Repeated cycling of the ignition key from ON to OFF and back to ON should finally fill the carb bowls and the fuel pump will then only run until the bowls are filled.

[Venturous Randy]

Or, instead of turning the ignition switch on and off, cycle the kill switch instead. Not as hard on the ignition switch and flipping the kill switch on and off is probably good for it in cleaning the contacts.

Randy

[KISA]

Venture work over 3 min - fuel pump good.

[Dave_Anderson]

on this note will the fuel pump stop running when it is up to pressure. Or will it run and by pass the pressure though a by pass valve

[Prairiehammer]

on this note will the fuel pump stop running when it is up to pressure. Or will it run and by pass the pressure though a by pass valve

 

The fuel pump is a "on demand" reciprocating pump. When the demand is satisfied, the pump ceases to pump.