Quote:
Originally Posted by turboguzzi
if you have petcocks with PRI position then they are vacuum operated by the running engine, so no need to turn off. they are shut whenever the motor is not running
in fact, a petcock with PRI doesnt even have an "off"....
With motor shut down, in normal and reserve positions there is no flow because there are no vacuum pulses from the motor.
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Sorry - my petcock doesn't have PRI. I meant to say RES. I have RES/ON/OFF
So yeah, at the moment, even with the pump installed, fuel is always flowing to my carbs, even with engine off. At least - when the tank is >25% full.
Can you explain to me the purpose of the triangle diaphragm bit ?
There's a rubber cap with diaphragm on the blue circle hole, which is pushed closed by a spring.
It definitely looks like it's supposed to close off the hole.
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